The word opposite to regular is irregular.
irregular
Ir- can be a prefix for regular: irregular.
It is a regular verb.
The word borrowed is a regular verb.
irregular. blow / blew / blown
If everybody is irregular, does that mean we are all actually regular?
answer: maybe!
When used as a verb, the word heart is a regular verb.
The root word is regular, with the prefix "ir-" added.
It is irregular.
The only word that rhymes with regular is irregularirregular. jugular. popular.