one, 1 / the first in order, foremost / the beginning / the best / a kind of; one of something / (card games) an ace / unity / the bottom string of a shamisen or other Japanese musical instrument

(law) a bar examination

(colloquial) current boyfriend

(grammar) a potential verb (indicates that something is possible)

everything

litmus test

a mock exam

oral examination; oral test

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)

everyone, one and all