cower

From Middle English couren, cowre, from Middle Low German kûren (“to lie in wait; linger”) or from North Germanic (Icelandic kúra (“to doze”)); according to Pokorny, all are ultimately from Proto-Indo-European *gew- (“to curve, bend”), see also Proto-Germanic *kuddô (“shell, pod”).

Cognate with German kauern (“to squat”), Dutch koeren (“to keep watch (in a cowered position)”), Serbo-Croatian kutriti (“to lie in a bent position”), Swedish kura (“huddle, cower”). Unrelated to coward, which is of Latin origin.