We would lack a human face as our symbol; we would exist in the ether of ideas with no concrete stake in the ground to tether us.
Power for the sensors flows up the tether and data flows down.
In this conversation, Rick realizes that to survive, he must tether himself to the present—to these people.
late 14c., "rope for fastening an animal," probably from Old Norse tjoðr "tether," from Proto-Germanic *teudran (cf. Danish tøir, 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.
late 15c., from tether (n.). Related: Tethered; tethering.