suffix for boys' names / indicates respect / indicates familiarity

second person personal pronoun: you

What? What did you say?

whatchamacallit, X

let me see; hmm

what

What?, Huh?

what / that thing (used in place of words you can't remember at the moment.)

what number, how many (used with a counter) / (used with も) many (used with a counter)

something