彼らのエベレスト登頂は偉業であった。

Sentence Analyzer

彼らのエベレスト登頂は偉業であった。

English Translation

Their climbing of Mt. Everest was a great achievement.

Furigana

彼(かれ)らのエベレスト登頂(とうちょう)は偉業(いぎょう)であった。

Romanji

Karera no eberesuto tōchō wa igyō de atta.

Words

彼ら (かれら)

they (usually male); them

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

登頂 (とうちょう)

climbing to the summit

は (は)

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

偉業 (いぎょう)

great enterprise; exploits

だ (だ)

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

或 (ある)

a certain ...; some ...