arrest (n.) Look up arrest at Dictionary.com
late 14c., from Anglo-French arest, Old French areste (n.), from arester "to stay, stop" (see arrest (v.)).
arrest (v.) Look up arrest at Dictionary.com
"to cause to stop," also "to detain legally," late 14c., from Old French arester "to stay, stop" (Modern French arrêter), from Vulgar Latin *arrestare (source also of Italian arrestare, Spanish and Portuguese arrestar), from ad- "to" (see ad-) + Latin restare "to stop, remain behind, stay back" (see rest (n.2)). Figurative sense of "to catch and hold" (the attention, etc.) is from 1814.