Merriam-Webster's Collegiate® Dictionary, 11th Edition
TUB
I. noun
Etymology: Middle English tubbe, from Middle Dutch; akin to Middle Low German tubbe tub
Date: 12th century
1. a wide low vessel originally formed with wooden staves, round bottom, and hoops, a small round container in which a product is sold , an old or slow boat, bathtub , the amount that a tub will hold, tubful noun tublike adjective
II. verb (tubbed; tubbing)
Date: 1610
transitive verb to wash or bathe in a tub, to put or store in a tub, intransitive verb bathe , to undergo washing, tubbable adjective tubber noun