彼が約束を守る事は、易しい事ではなかった。

Sentence Analyzer

約束 守る 易しい なかった

English Translation

It wasn't easy for him to keep his promise.

Furigana

(かれ)約束(やくそく)(まも)(こと)は、(やさ)しい(こと)ではなかった。

Romanji

Kare ga yakusoku o mamoru koto wa, yasashii koto de wa nakatta.

Words

(かれ)
he; him; his; boyfriend
()
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
約束 (やくそく)
promise; agreement; arrangement; one's word; contract; pact; appointment; engagement; date; convention; rule; destiny; fate
()
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.
守る (まもる)
to protect; to guard; to defend; to keep (i.e. a promise); to abide (by the rules); to observe; to obey; to follow
(こと、こん)
thing; matter; incident; occurrence; event; something serious; trouble; crisis; circumstances; situation; state of affairs; work; business; affair; after an inflectable word, creates a noun phrase indicating something the speaker does not feel close to; nominalizing suffix; pretending to ...; playing make-believe ...; alias; aka; nickname; alternative name; also known as
()
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
易しい (やさしい)
easy; plain; simple
()
be; is; indicates past or completed action; indicates light imperative
無い (ない)
nonexistent; not being (there); unpossessed; unowned; not had; unique; indicates negation, inexperience, unnecessariness or impossibility; not ...; to not be...; to have not ...

Kanji

Readings: ヒ、 かれ、 かの、 か.の
Meanings: he, that, the
Readings: ヤク、 つづ.まる、 つづ.める、 つづま.やか
Meanings: promise, approximately, shrink
Readings: ソク、 たば、 たば.ねる、 つか、 つか.ねる
Meanings: bundle, sheaf, ream, tie in bundles, govern, manage, control
Readings: シュ、 ス、 まも.る、 まも.り、 もり、 -もり、 かみ
Meanings: guard, protect, defend, obey
Readings: ジ、 ズ、 こと、 つか.う、 つか.える
Meanings: matter, thing, fact, business, reason, possibly
Readings: エキ、 イ、 やさ.しい、 やす.い
Meanings: easy, ready to, simple, fortune-telling, divination