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Precocious
(of a child) having developed certain abilities or proclivities at an earlier age than usual.
Pretentious
characterized by assumption of dignity or importance
Prudent
acting with or showing care and thought for the future
Ravishing
delightful; entrancing
Remorseful
filled with sorry or regret .
Reprobate
an unprincipled person (often used humorously or affectionately)
Resigned
submissive or acquiescent
Recalcitrant
resisting authority or control; not obedient or compliant; refractory
Robust
strong and healthy; vigorous
Sanguine
optimistic or positive, especially in an apparently bad or difficult situation
Sardonic
grimly mocking or cynical
Sober
marked by sedate or gravely or earnestly thoughtful character or demeanor
Solicitous
characterized by or showing interest or concern.
Staid
sedate, respectable, and unadventurous.
Surly
bad-tempered and unfriendly.