Definition of "undesigning"
adjective
comparative more undesigning, superlative most undesigning
(now rare) Having no artful, ulterior, or fraudulent purpose; sincere; artless; ingenuous.
Quotations
Cecilia, […] finding him gay and easy, general in his conversation, and undesigning in his looks, soon recovered from her embarrassment, and passed the rest of the day without restraint or uneasiness.
1782, Frances Burney, chapter 9, in Cecilia, volume 2, pages 118–119