flighty

From flight +‎ -y. Compare Dutch vluchtig (“volatile; fleeting; cursory”), German flüchtig (“volatile; fleeting; momentary; quick”), Danish flygtig (“elusive; evasive”), Swedish flyktig.

flighty (comparative flightier, superlative flightiest)

Given to unplanned and silly ideas or actions.
(of a bird) That flies easily or often.
- 2013, Diego Gil, Henrik Brumm, Avian Urban Ecology‎:
  "We know that flighty birds suffer from greater risk of raptor predation, and I assume that it is useful to understand the effects of urbanization because flighty species may be more vulnerable to anthropogenic disturbance."
(dated) Swift.
- 1962 July, Cecil J. Allen, “Locomotive Running Past and Present”, in Modern Railways, page 44:
  Permanent way and other checks then somewhat slowed down this flighty progress.

given to silly ideas

Asturian: antoxadiegu, antoxón
Bulgarian: вятърничав (bg) (vjatǎrničav), лекомислен (bg) (lekomislen)
Chinese:
Mandarin: 輕浮 / 轻浮 (zh) (qīngfú)
Czech: nestálý, přelétavý
Esperanto: facilanima
Finnish: kevytmielinen
French: candide (fr), insouciant (fr)
German: flatterhaft (de), schrullig (de), albern (de)
Greek: ελαφρόμυαλος (el) (elafrómyalos), επιπόλαιος (el) (epipólaios), φαντασιόπληκτος (el) (fantasiópliktos)
Hebrew: קַל דַּעַת m (qal dá'at)
Irish: aerach, aidhmeannach, arduallach, giodalach
Ottoman Turkish: خفیف (hafif)
Russian: взбалмошный (ru) (vzbalmošnyj)
Spanish: caprichoso (es), necio (es)
Welsh: penysgafn (cy), penchwiban (cy)

(of a bird) that flies easily or often

(obsolete) swift

English