Old English *wræstlian, frequentative of wræstan "to wrest" (see wrest) with -el (3). Compare North Frisian wrassele, Middle Low German worstelen. Figurative sense is recorded from early 13c. Related: Wrestled; wrestling.
derivational suffix, also -le, used mostly with verbs but originally also with nouns, "often denoting diminutive, repetitive, or intensive actions or events" [The Middle English Compendium], from Old English. Compare brastlian alongside berstan (see burst); nestlian (see nestle) alongside nistan). It is likely also in wrestle, trample, draggle, struggle, twinkle, also noddle "to make frequent nods" (1733). New formations in Middle English might be native formations (jostle from joust) with this or borrowings from Dutch.