おびただしい数の人々が集まってきていた。

Sentence Analyzer

おびただしい 人々 集まってきていた

English Translation

People were gathering in a huge mass.

Furigana

おびただしい(かず)人々(ひとびと)(あつ)まってきていた。

Romanji

Obitadashii kazu no hitobito ga atsumattekiteita.

Words

夥しい (おびただしい)
large number; innumerable; great many; immense; vast; abundant
()
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
人々 (ひとびと、にんにん)
each person; people; men and women; everybody
()
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
集まる (あつまる)
to gather; to collect; to assemble

Kanji

Readings: スウ、 ス、 サク、 ソク、 シュ、 かず、 かぞ.える、 しばしば、 せ.める、 わずらわ.しい
Meanings: number, strength, fate, law, figures
Readings: ジン、 ニン、 ひと、 -り、 -と
Meaning: person
Readings: シュウ、 あつ.まる、 あつ.める、 つど.う
Meanings: gather, meet, congregate, swarm, flock