Iniquitous is a related term of unprincipled.
As adjectives the difference between iniquitous and unprincipled
is that iniquitous is wicked or sinful while unprincipled is lacking moral values.
iniquitous
English
Adjective
(
en adjective)
wicked or sinful
morally objectionable
Synonyms
* (wicked :) flagitious
* (wicked :) nefarious
* (morally objectionable :) perverse
Antonyms
* (wicked :) righteous
* (morally objectionable :) righteous
unprincipled
English
Synonyms
*licentious, immoral
Related terms
*principled
*principle
References
*Oxford English Dictionary