full (adj.) Look up full at Dictionary.com
O.E. full "completely, full," from P.Gmc. *fullaz (cf. O.Fris. ful, O.N. fullr, O.H.G. fol, Ger. voll, Goth. fulls), from PIE *ple- (see plenary). Adverbial sense was common in M.E. (full well, full many, etc.). Full moon was O.E. fulles monan; first record of full-blood in relation to racial purity is from 1812. Full house is 1710 in the theatrical sense, 1887 in the poker sense.
full (v.) Look up full at Dictionary.com
"to tread or beat cloth to cleanse or thicken it," late 14c., from O.Fr. fuler (see foil (v.)); O.E. had the agent-noun fuller, probably directly from L. fullo. The material called fuller's earth (silicate of alumina) is first recorded 1520s, so called because it was used in cleansing cloth.