to trust; to believe in
Depicts a hand (爫) capturing a child (子). In ancient times during war, the victors would kill the enemy's adult men and capture only the women and children. Based on the original meaning "captive", now written as 俘.
《說文》：“孚，卵孚也。从爪，从子。一曰信也。，古文孚从，，古文。”