rudimental

== English == === Etymology === From rudiment +‎ -al. === Adjective === rudimental (comparative more rudimental, superlative most rudimental) (uncommon) Rudimentary. Synonyms: primitive, rude, undeveloped; see also Thesaurus:crude ==== Usage notes ==== Used less than 1% as often as rudimentary in US and UK (per COCA and BNC). ==== Derived terms ==== rudimentally