いつ頃着きますか。

to need; to want

indicates two contrasting actions; indicates possessive (often found in place names and compound words)

(approximate) time; around; about; toward; suitable time (or condition); time of year; season

to arrive at; to reach; to sit on; to sit at (e.g. the 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