挨拶に困った。

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)

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

to be troubled; to be worried; to be bothered; to be embarrassed; to be stumped