'Whim·si·cal /ˈʰwɪmzɪkəl, ˈwɪm-/ Show Spelled[hwim-zi-kuhl, wim-]
1.given to whimsy or fanciful notions; capricious: a pixyish, whimsical fellow.
2.of the nature
of or proceeding from whimsy, as thoughts or actions: Her writing showed whimsical notions of human behavior.
3.erratic; unpredictable: He was too whimsical with regard to his work.
1645–55; whims(y) + -ical