English
tappable
From tap + -able.
Formed from tap + -able
Proto-Indo-European *deh₂p- ‘to lose’
Proto-Germanic *tappô ‘a plug, tap’
Proto-West Germanic *tappō
Old English tæppa ‘tap, spigot’
Middle English tappe ‘hollow device for controlling the flow of…’
English tap
Today it means
adj Capable of being tapped.
Language periods are conventional ranges, not dates for this word.
Etymograph / tappable