それが何だったか誰も知らない。

Sentence Analyzer

それ だった 知らない

English Translation

Goodness knows what it was.

Furigana

それが(なに)だったか(だれ)()らない。

Romanji

Sore ga nani datta ka dare mo shiranai.

Words

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
()
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
(なに、なん)
what; how many; you-know-what; that; whatsit; what's the expression; what do you call them; what?; hey!
()
be; is; indicates past or completed action; indicates light imperative
()
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
(だれ、たれ、た)
who
()
too; also; in addition; as well; (not) either (in a negative sentence); both A and B; A as well as B; neither A nor B (in a negative sentence); even; as much as; as many as; as far as; as long as; no less than; no fewer than; even if; even though; although; in spite of; further; more; again; another; the other
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

Kanji

Readings: カ、 なに、 なん、 なに-、 なん-
Meaning: what
Readings: スイ、 だれ、 たれ、 た
Meanings: who, someone, somebody
Readings: チ、 し.る、 し.らせる
Meanings: know, wisdom