safety-pin

verb (used with object), safe·ty-pinned, safe·ty-pin·ning.

1. to secure or affix with a safety pin: to safety-pin a child’s mittens to his coat sleeve.

noun

1. a pin bent back on itself to form a spring, with a guard to cover the point.

noun

1. a spring wire clasp with a covering catch, made so as to shield the point when closed and to prevent accidental unfastening
2. another word for pin (def. 9)

n.1857, from safety + pin (n.).