- tether (n.)
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[tether 词源字典] - late 14c., "rope for fastening an animal," not found in Old English, probably from a Scandinavian source akin to Old Norse tjoðr "tether," from Proto-Germanic *teudran (cognates: Danish tøir, Old Swedish tiuther, Swedish tjuder, Old Frisian tiader, Middle Dutch tuder, Dutch tuier "line, rope," Old High German zeotar "pole of a cart"), from PIE root *deu- "to fasten" + instrumentive suffix *-tro-. Figurative sense of "measure of one's limitations" is attested from 1570s.[tether etymology, tether origin, 英语词源]
- tether (v.)
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- late 14c. (implied in tethering), "confine by a tether," originally of grazing animals, from tether (n.). Figurative use also from late 14c. Related: Tethered.