Fuller
来自Big Physics
Old English fullere, from Latin fullo, of unknown origin.
wiktionary
From full.
From full + -er, from the verb.
Unknown origin.
etymonline
fuller (n.)
"one who fulls cloth," Old English fullere "fuller" (Mark ix.3), from Latin fullo "fuller" (see foil (v.)). The native word is walker. Fuller's earth (silicate of alumina) is recorded by 1520s; so called because it was used in cleansing cloth.