One is thumb.
4 finger and a thumb on a hand
T is for to. B is for be. D is for determined. TBD is an abbreviation for "to be determined."
Thumb Torso
to be determined
The letter "t" in American Sign Language is formed by making a closed fist and extending the thumb straight up. This handshape represents the letter "t" when fingerspelling words in ASL.
tongue, teeth, tonsils, throat, thumb.....
thumb, throb
Fasle
Tom Thumb Cactus is a prickly plant.
determined, courageous
True(OW)