道で先生に挨拶する。

road; street; way; path; course; route; lane; distance; ways (e.g. "a long ways"); the way (of proper conduct, etc.); one's way; morals; teachings (esp. Confucian or Buddhist); dogma; field (of medicine, etc.); subject; way; method; means

indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.

teacher; master; doctor; with names of teachers, etc. as an honorific; previous existence

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

greeting; greetings; salutation; salute; polite set phrase used when meeting or parting from somebody; polite set phrase used to express apology, sympathy, congratulations, etc.; speech (congratulatory or appreciative); address; reply; response; revenge; retaliation; a fine thing to say (used as part of a sarcastic response to a rude remark); dialoging (with another Zen practitioner to ascertain their level of enlightenment)