セントヘレンズ山が爆発したのは、ほとんど１０年前、つまり１９８０年の５月８日のことであった。

Sentence Analyzer

English Translation

It was almost a decade ago, on May 8th, 1980, that Mount St. Helens erupted.

Furigana

セントヘレンズ山(さ)が爆発(ばくはつ)したのは、ほとんど１０年(ねん)前(まえ)、つまり１９８０年(ねん)の５月(ごがつ)８日(にち)のことであった。

Romanji

Sentoherenzusan ga bakuhatsushita no wa, hotondo ichi zero nen mae, tsumari ichi kyū hachi zero nen no gogatsu hachi nichi no koto de atta.

Words

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

爆発 (ばくはつ)

explosion; detonation; eruption

の (の)

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

殆ど (ほとんど)

mostly; nearly; practically; well-nigh; almost invariably; all but; just about; almost

一 (いち)

one; best; first; foremost; beginning; start; bottom string (on a shamisen, etc.)

○ (まる)

circle (sometimes used for zero); 'correct' (when marking); symbol used as a placeholder (either because a number of other words could be used in that position, or because of censorship); period; full stop; maru mark; semivoiced sound; p-sound

年 (とし)

year; many years; age; past one's prime; old age

前 (まえ)

ago; before (some event); previously; (minutes) to (the hour); in front (of); before (e.g. the house); head (of a line); front (e.g. of a bus); fore part; in the presence of; helping; portion; privates; private parts

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

九 (きゅう、く、ここの、この、ここ)

nine

八 (はち、や)

eight

五月 (ごがつ)

May

日 (にち)

Sunday; day (of the month); counter for days; Japan

事 (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

だ (だ)

be; is; indicates past or completed action; indicates light imperative

或 (ある)

a certain ...; some ...