Adjectival nouns or quasi-adjectives (keiyodoshi); Adverb taking the 'to' particle; Common noun

busy; hurried; rushed

Expressions; Letters ending with this start with 前略, 冠省, etc.

yours sincerely; yours in haste

Archaic; Adjectival nouns or quasi-adjectives (keiyodoshi); Common noun

simple; brief; quick

Formal or literary term

hurried; hasty; busy; precipitate; sudden; abrupt

days and nights passing by quickly; months and years flying by; time flies

in great haste; hurriedly; in a hurry