English
forethoughtless
From forethought + -less.
Formed from forethought + -less
Proto-Indo-European *teng- ‘to think, feel, perceive, know’
…
Proto-West Germanic *þankijan ‘to think’
Old English þenċan ‘to think’
Old English foreþenċan
Middle English forethouht
English forethought
Today it means
adj Without forethought.
Language periods are conventional ranges, not dates for this word.
Etymograph / forethoughtless