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
further
farthest
furthest
- 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.