Unclear or unreliable.
Experiencing or showing doubt, sceptical.
Subject to, or causing doubt.
Improbable or unlikely.
Suspicious, or of dubious character.
Undecided or of uncertain outcome.
A doubtful person or thing.
Possessing or indicating lack; deficient.
A stretch of fishing-lines shot in the water.
A girth or belly-band for a horse's harness.
A surcingle, or strap of leather, used for binding a load upon the back of an animal.
A leather tie; a short wagon rope.