delay (n.)
mid-13c., from Old French delaie, from delaiier (see delay (v.)).
delay (v.)
c. 1300, from Old French delaiier, from de- "away, from" (see de-) + laier "leave, let." This is perhaps a variant of Old French laissier, from Latin laxare "slacken, undo" (see lax). But Watkins has it from Frankish *laibjan, from a Proto-Germanic causative form of PIE root *leip- "to stick, adhere." Related: Delayed; delaying.