goat

\ \ [OE] Old English had no all-purpose word for ‘goat’; the male goat was a bucca (‘buck’) and the female goat was a gāt. In early Middle English, goat began to encroach on the semantic territory of buck, and by the 14th century it had come to be the dominant form for both sexes, as is shown by the emergence around that time of the distinguishing terms she-goat and he-goat (nanny-goat and billy-goat are much later – 18th-century and 19th-century respectively). Goat itself comes via prehistoric Germanic *gaitaz (source of German geiss, Dutch geit, Swedish get, and Danish ged) from Indo- European *ghaidos. This may be related to Lithuanian zaidziu ‘play’, and if so, the goat could be etymologically the ‘animal that jumps about’ (semantic development in the opposite direction has given English caper from Latin caper ‘goat’).