Old English crycce "crutch, staff," from Proto-Germanic *krukjo (cognates: Old Saxon krukka, Middle Dutch crucke, Old High German krucka, German Kröcke "crutch," related to Old Norse krokr "hook;" see crook). Figurative sense is first recorded c. 1600. As a verb, from 1640s. Italian gruccia "crutch," crocco "hook" are Germanic loan-words.
1. He wrenched the crutch from Jacob, who didn'tfight him for it.
2. He kicked him in the crutch.
3. He gave up the crutch of alcohol.
4. Her religion was a crutch to her when John died.
5. The calculator is a tool, not a crutch; yet it is increasingly being used as a crutch by many children.