tumblers is a form of:

Tumbler



noun
1.
(An ordinary drinking glass with no stem, an acrobat or gymnast who does somersaults, etc., part of a lock which must be turned to a certain point by a key before the lock will open, any of several kinds of pivoted or swiveling parts in a mechanism) drinking tumbler កែវ, lock tumbler គន្លឹះនៅក្នុងមេសោរ
2.
(កីឡា) អ្នកដាំដូង (កីឡា)
Example: He's a tumbler.
adjective
1.
ដែលបំប៉ោង
ENGLISH MEANING
noun
1.
One who tumbles; one who plays tricks by various motions of the body; an acrobat.
2.
A movable obstruction in a lock, consisting of a lever, latch, wheel, slide, or the like, which must be adjusted to a particular position by a key or other means before the bolt can be thrown in locking or unlocking.
3.
A piece attached to, or forming part of, the hammer of a gunlock, upon which the mainspring acts and in which are the notches for sear point to enter.
4.
A drinking glass, without a foot or stem; -- so called because originally it had a pointed or convex base, and could not be set down with any liquor in it, thus compelling the drinker to finish his measure.
5.
A variety of the domestic pigeon remarkable for its habit of tumbling, or turning somersaults, during its flight.
6.
A breed of dogs that tumble when pursuing game. They were formerly used in hunting rabbits.
7.
A kind of cart; a tumbrel.