Without a chart or map; lacking navigational guidance; uncharted or unmapped.
From chart plus -less suffix meaning 'without.' Chart from Latin charta meaning 'paper' or 'map.'
Chartless waters terrified sailors—sailing into the unknown without maps meant relying on stars, intuition, and luck, which is why early explorers were celebrated as heroes despite frequently getting lost!
Complete word intelligence in one call. Free tier — 50 lookups/day.