つまり、おそらく、初めに調査をした者や技術者には知られていなかった物理的な障害が出てきて、それを克服するためにさまざまな変更が必要になる。

Sentence Analyzer

つまり おそらく 初め 調査 した 技術者 知られていなかった 物理的 障害 出てきて それ 克服する ために さまざまな 変更 必要 なる

English Translation

In other words, physical obstacles, perhaps unknown to the original surveyor and engineer, requiring alterations to be made in order to surmount them.

Furigana

つまり、おそらく、(はじ)めに調査(ちょうさ)をした(もの)技術者(ぎじゅつしゃ)には()られていなかった物理的(ぶつりてき)障害(しょうがい)()てきて、それを克服(こくふく)するためにさまざまな変更(へんこう)必要(ひつよう)になる。

Romanji

Tsumari, osoraku, hajime ni chōsa o shita mono ya gijutsusha ni wa shirareteinakatta butsuriteki na shōgai ga detekite, sore o kokufukusuru tameni samazamana henkō ga hitsuyō ni naru.

Words

詰まり (つまり)
that is to say; that is; in other words; I mean; in short; in brief; to sum up; ultimately; in the end; in the long run; when all is said and done; what it all comes down to; when you get right down to it; basically; clogging; obstruction; stuffing; (degree of) blockage; shrinkage; end; conclusion; dead end; corner; distress; being at the end of one's rope
恐らく (おそらく)
perhaps; likely; probably; I dare say
始め (はじめ)
beginning; start; outset; opening; first (in line, etc.); origin; such as ...; not to mention ...
()
at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although
調査 (ちょうさ)
investigation; examination; inquiry; enquiry; survey
()
indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
為る (する)
to do; to cause to become; to make (into); to turn (into); to serve as; to act as; to work as; to wear (clothes, a facial expression, etc.); to judge as being; to view as being; to think of as; to treat as; to use as; to decide on; to choose; to be sensed (of a smell, noise, etc.); to be (in a state, condition, etc.); to be worth; to cost; to pass (of time); to elapse; verbalizing suffix (applies to nouns noted in this dictionary with the part of speech "vs"); creates a humble verb (after a noun prefixed with "o" or "go"); to be just about to; to be just starting to; to try to; to attempt to
(もの、もん)
person
()
such things as (non-exhaustive list related to a specific time and place); and ... and; the minute (that) ...; no sooner than ...; as soon as; punctuational exclamation in haiku, renga, etc.; interjection expressing surprise; hi; plain copula; yes; what?; indicates a question
技術者 (ぎじゅつしゃ)
engineer; technical expert; technician; craftsperson
()
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
知る (しる)
to be aware of; to know; to be conscious of; to cognize; to cognise; to notice; to feel; to understand; to comprehend; to grasp; to remember; to be acquainted with (a procedure); to experience; to go through; to learn; to be acquainted with (a person); to get to know; to concern
物理的 (ぶつりてき)
physical
()
be; is; indicates past or completed action; indicates light imperative
障害 (しょうがい、しょうげ)
obstacle; impediment; hindrance; difficulty; barrier; handicap; impairment; disability; disorder; malfunction
()
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
出る (でる)
to leave; to exit; to go out; to come out; to get out; to leave (on a journey); to depart; to start out; to set out; to move forward; to come to; to get to; to lead to; to reach; to appear; to come out; to emerge; to surface; to come forth; to turn up; to be found; to be detected; to be discovered; to be exposed; to show; to be exhibited; to be on display; to appear (in print); to be published; to be announced; to be issued; to be listed; to come out; to attend; to participate; to take part; to enter (an event); to play in; to perform; to be stated; to be expressed; to come up; to be brought up; to be raised; to sell; to exceed; to go over; to stick out; to protrude; to break out; to occur; to start; to originate; to be produced; to come from; to be derived from; to be given; to get; to receive; to be offered; to be provided; to be presented; to be submitted; to be handed in; to be turned in; to be paid; to answer (phone, door, etc.); to get; to assume (an attitude); to act; to behave; to pick up (speed, etc.); to gain; to flow (e.g. tears); to run; to bleed; to graduate
其れ (それ)
that (indicating an item or person near the listener, the action of the listener, or something on their mind); it; that time; then; there (indicating a place near the listener); you
克服 (こくふく)
conquest (problem, disease, handicap, etc. e.g. poverty, illness); overcoming; bringing under control; subjugation; victory over
為に (ために)
for; for the sake of; to one's advantage; in favor of; in favour of; on behalf of; because of; as a result of
様々 (さまざま)
varied; various
変更 (へんこう)
change; modification; alteration; revision; amendment
必要 (ひつよう)
necessary; needed; essential; indispensable; necessity; need; requirement
成る (なる)
to become; to get; to grow; to be; to reach; to attain; to result in; to prove to be; to consist of; to be composed of; to succeed; to be complete; to change into; to be exchanged for; to play a role; to be promoted; to do ...

Kanji

Readings: ショ、 はじ.め、 はじ.めて、 はつ、 はつ-、 うい-、 -そ.める、 -ぞ.め
Meanings: first time, beginning
調
Readings: チョウ、 しら.べる、 しら.べ、 ととの.う、 ととの.える
Meanings: tune, tone, meter, key (music), writing style, prepare, exorcise, investigate, harmonize, mediate
Reading: 
Meaning: investigate
Readings: シャ、 もの
Meanings: someone, person
Readings: ギ、 わざ
Meanings: skill, art, craft, ability, feat, performance, vocation, arts
Readings: ジュツ、 すべ
Meanings: art, technique, skill, means, trick, resources, magic
Readings: チ、 し.る、 し.らせる
Meanings: know, wisdom
Readings: ブツ、 モツ、 もの、 もの-
Meanings: thing, object, matter
Readings: リ、 ことわり
Meanings: logic, arrangement, reason, justice, truth
Readings: テキ、 まと
Meanings: bull's eye, mark, target, object, adjective ending
Readings: ショウ、 さわ.る
Meanings: hinder, hurt, harm
Reading: ガイ
Meanings: harm, injury
Readings: シュツ、 スイ、 で.る、 -で、 だ.す、 -だ.す、 い.でる、 い.だす
Meanings: exit, leave, go out, come out, put out, protrude
Readings: コク、 か.つ
Meanings: overcome, kindly, skillfully
Reading: フク
Meanings: clothing, admit, obey, discharge
Readings: ヘン、 か.わる、 か.わり、 か.える
Meanings: unusual, change, strange
Readings: コウ、 さら、 さら.に、 ふ.ける、 ふ.かす
Meanings: grow late, night watch, sit up late, of course, renew, renovate, again, more and more, further
Readings: ヒツ、 かなら.ず
Meanings: invariably, certain, inevitable
Readings: ヨウ、 い.る、 かなめ
Meanings: need, main point, essence, pivot, key to