Without bars; not having bars or barriers that restrict or confine something.
From Middle English 'bar' (a rod or barrier) plus the suffix '-less' (meaning 'without'). The word developed in English to describe anything from which bars have been removed or that was never equipped with bars.
This word reveals how English speakers loved to describe absence—we don't just say 'no bars' but create a new word 'barless.' Medieval writers used it to describe open windows and unbarred doors, showing how important those iron bars were for security and imprisonment.
Complete word intelligence in one call. Free tier — 50 lookups/day.