English
greenskin
Compound of green + skin.
Proto-Indo-European *gʰreh₁- ‘to grow’
…
Proto-Germanic *grōniz
Proto-West Germanic *grōnī
Old English grēne
Middle English grene
English green
Proto-Indo-European *sken- ‘to split off’
Proto-Germanic *skinþą ‘animal hide’
Old Norse skinn ‘animal hide’
Old English scinn ‘a skin’
Middle English skyn ‘a hide’
English skin
Today it means
noun One of several distinct green-skinned creatures often grouped together, such as orcs, goblins and (sometimes) trolls.
Language periods are conventional ranges, not dates for this word.
Etymograph / greenskin