The right sign for "tunnel" depends on whether you mean the noun or
the verb. It also depends on what the tunnel looks like.
TUNNEL (verb)
If you mean the verb:
* You can use a cupped hand doing a scooping movement to show a
backhoe or similar bucket-type device.
* You can use two cupped hands doing scooping/digging movements to
show an animal "tunneling"
* Use an index finger doing a forward corkscrew movement to show a
drill-type device tunneling,
* Use an index finger bending and unbending (1,X,1,X) as it moves
forward to show the tunneling of a worm (or similar creatures).
TUNNEL (noun)



See: CAVE
See: PIPELINE
See: POLE
You can learn
American Sign Language (ASL) online at American Sign Language University ™
ASL resources by Lifeprint.com © Dr. William Vicars