Step 1: Context: He uses few words, sister uses many cheerfully on trivial topics.
Step 2: Options: Terse (concise), Laconic (brief), Lithe (flexible), Enigmatic (mysterious),
Hedonistic (pleasure-seeking); Verbose (wordy), Loquacious (talkative), Boorish (rude),
Ponderous (heavy), Ascetic (self-denying); Harangue (rant), Prattle (chat idly), Lampoon
(satire), Chatter (talk), Abstain (refrain).
Step 3: Laconic (using few words), Loquacious (talkative), Prattle (idle chatter) fit.
Step 4: Others mismatch brevity, talkativeness, or cheerful tone.