delicate
孅 centers on a quality of being physically or structurally delicate, like something slender, fragile, or easily broken.
孅 combines 女 (woman) with 韱, which likely contributes the sound and may carry a sense of slender or fine. The exact historical development of 韱 is uncertain.
A woman 女 beside the intricate, slender shape 韱 suggests something fine and delicate, like a fragile ornament.
For セン, picture a delicate sen (cent) coin, so thin it could bend: sen -> セン, and the fragile coin matches the delicate meaning.