Serious
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easy, deceptive, friendly, foolish, fatuous, beneficial, happy, insincere, balmy, innocuous, untrustworthy, cuckoo, mad, frivolous, kooky, senseless, jesting, insane, uproarious, worthless, unthreatening, half-witted, unserious, minor, sappy, light, flippant, false, loony, wacky, brainless, screwball, hilarious, unwise, misleading, facile, nonhazardous, calm, noncritical, cockeyed, jerky, lite, insignificant, meaningless, zany, dishonest, innocent, crazy, safe, daft, small, asinine, unimportant, nutty, joking, lunatic, harmless, nonsensical, dotty, nonintellectual, little, Daffy, noncrucial, advantageous, funny, good, witless, trivial, Weak-minded.