unflexible

== English == === Etymology === From un- +‎ flexible. === Adjective === unflexible (comparative more unflexible, superlative most unflexible) Not flexible. Synonym: inflexible === References === “unflexible”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.