Undesigning is a related term of guileless.
As adjectives the difference between undesigning and guileless
is that undesigning is having no artful, ulterior, or fraudulent purpose; sincere; artless; simple while guileless is free from guile; honest but.
undesigning
English
Adjective
(
en adjective)
Having no artful, ulterior, or fraudulent purpose; sincere; artless; simple.