indicates the quality of being similar to or having a tendency towards

alternative/alternate solution/answer

(archaic) explanation (of meaning); interpretation

undoing a lock; unlocking

to undo a lock; to unlock

(education, language learning) listening comprehension

to understand spoken language that one hears

(historical) Japanese-language annotation of Chinese-language works / (historical) Korean-language annotation of Chinese-language works

optimal solution

(uncommon, scholarly) Putonghua; Standard Mandarin