| Answer | Crossword Clue |
|---|---|
| tonnell | a tunnel (an underground passageway) |
| tonnells | TONNELL, a tunnel (an underground passageway) |
| tunnel | an underground passageway / to dig a tunnel |
| qanat | an underground water tunnel |
| qanats | QANAT, an underground water tunnel |
| qanats | (in the Middle East) A gently sloping underground channel or tunnel constructed to lead water from the interior of a hill to a village below |
| qanat | (in the Middle East) A gently sloping underground channel or tunnel constructed to lead water from the interior of a hill to a village below |
