noun / ~する noun / ~の noun:

• 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 - slang

expression:

• a fine thing to say - used sarcastically as a response to a rude remark; usu. in the form of ご挨拶 - humorous term
• dialoging (with another Zen practitioner to ascertain their level of enlightenment) - orig. meaning ➜ 一挨一拶

noun:

• relationship (between people); connection - archaism
• intervention; mediation; mediator - archaism

noun / noun or verb acting prenominally:

• charisma (i.e. attractiveness, charm) - From German "Charisma"
• charisma (i.e. divinely conferred power or talent); charism
• charismatic person
• someone famous (usu. for their talent); celebrity; idol; icon - colloquialism

godan ~く verb / transitive:

• to strike; to clap; to knock; to beat; to tap; to pat
• to play drums
• to abuse; to flame (e.g. on the Internet); to insult
• to consult; to sound out
• to brag; to talk big
• to call; to invoke (e.g. a function) - IT term