Lacking the ability to anticipate or plan for the future; showing poor judgment or lack of consideration for what might happen later.
Foresight + -less (without/lacking). The -less suffix, from Old English 'lēas,' creates the opposite meaning by indicating absence or deprivation.
The morphology of insults reveals what societies valued most—Old English created 'headless,' 'thoughtless,' 'foresightless' to describe failures of cognition because planning ahead literally meant the difference between survival and starvation in medieval life.
Complete word intelligence in one call. Free tier — 50 lookups/day.