トランクには鍵がかけられていますか。

suitcase; trunk; trunk (of a car); boot; (trunk) line

at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although

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

key; lock

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

to suspend between two points; to build (a bridge, etc.); to put up on something (e.g. legs up on table)

indicates a question (sometimes rhetorical); or; whether or not; some- (e.g. something, someone); indicates doubt, uncertainty, etc.; emphatic prefix; suffix forming adjectives or adverbs; in that way