Irregular adjective

From Teflpedia

An irregular adjective is an adjective that is irregular. Compare regular adjective. It's a type of irregular modifier along with irregular adverbs.

That is it has irregular gradative (comparative and superlative) forms.

Simple adjective Comparative adjective Superlative adjective Notes
bad worse worst
far farther
- former first This is a simple-defective adjective that lacks a simple adjective form.
good better best
little less least This is ambiregular, as it has the forms little/littler/littlest
much/many more most
old elder eldest This is ambiregular, as it also has the regular form old/older/oldest.