彼は捕らわれの身である。

he; him; his; boyfriend

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

to be caught; to be captured; to be taken prisoner; to be arrested; to be apprehended; to be seized with (fear, etc.); to be a slave to; to stick to; to adhere to; to be swayed by

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

body; oneself; one's place; one's position; main part; meat (as opposed to bone, skin, etc.); wood (as opposed to bark); blade (as opposed to its handle); container (as opposed to its lid)

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

a certain ...; some ...