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KEY: Solve.
SYN: Explain, resolve, unfold, work out, clear up, [See EXPLAIN].
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KEY: Sombre.
SYN: Dull, grave, gloomy, dark, murky, cloudy, funereal, sable, mournful, dusky, pensive, melancholy.
ANT: Bright, gay, sunny, joyous.
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KEY: Somnolent.
SYN: Sleepy, drowsy, dozy, dreamy.