Archaic term meaning for days (on end); for several days continuously or in succession.
From for + days (plural of day). An old formation where 'for' functions as a preposition indicating duration, contracted or compounded into a single word.
Medieval travelers wrote 'they rode fordays' instead of 'for days'—the compound form suggesting an exhausting, seemingly endless stretch of continuous travel through unmarked wilderness.
Complete word intelligence in one call. Free tier — 50 lookups/day.