【机】 taper hand tap
at the beginning of; early; elementary; first; original
【医】 arch-; arche-; prot-; proto-
path; road; doctrine; Tao; say; talk; way; method
【医】 canal; canales; canalis; meatus; passage; path; pathway; tract; tractus
viae
screw tap
【机】 screwtap; tap