誰か窓を開けっ放しにしていたに違いない。

Sentence Analyzer

開けっ放し していた 違いない

English Translation

Someone must have left the window open.

Furigana

(だれ)(まど)()けっ(ぱな)しにしていたに(ちが)いない。

Romanji

Dare ka mado o akeppanashi ni shiteita ni chigainai.

Words

(だれ、たれ、た)
who
()
indicates a question (sometimes rhetorical); or; whether or not; some- (e.g. something, someone); indicates doubt, uncertainty, etc.; emphatic prefix; suffix forming adjectives or adverbs; in that way
(まど)
window
()
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.
開けっ放し (あけっぱなし)
leaving open; leaving ajar; outspoken; frank
()
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
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
違い (ちがい)
difference; discrepancy

Kanji

Readings: スイ、 だれ、 たれ、 た
Meanings: who, someone, somebody
Readings: ソウ、 ス、 まど、 てんまど、 けむだし
Meanings: window, pane
Readings: カイ、 ひら.く、 ひら.き、 -びら.き、 ひら.ける、 あ.く、 あ.ける
Meanings: open, unfold, unseal
Readings: ホウ、 はな.す、 -っぱな.し、 はな.つ、 はな.れる、 こ.く、 ほう.る
Meanings: set free, release, fire, shoot, emit, banish, liberate
Readings: イ、 ちが.う、 ちが.い、 ちが.える、 -ちが.える、 たが.う、 たが.える
Meanings: difference, differ