Old English wascan "to wash, cleanse, bathe," transitive sense in late Old English, from Proto-Germanic *watskan "to wash" (source also of Old Norse vaska, Middle Dutch wasscen, Dutch wassen, German waschen), from PIE root *wed- (1) "water; wet." Related: Washed; washing.
Used mainly of clothes in Old English (the principal verb for washing the body, dishes, etc. being þwean). Old French gaschier "to stain, soil; soak, wash" (Modern French gâcher) is from Frankish *waskan, from the same Germanic source. Italian guazzare also is a Germanic loan-word. To wash (one's) hands of something is 1550s, from Pilate in Matthew xxvii.24. To wash up "clean utensils after a meal" is from 1751. Washed up "no longer effective" is 1923, theater slang, from notion of washing up at the end of a job.
stand n.
Old English stand "a pause, delay, state of rest or inaction," from the root of stand (v.). Compare Dutch and German stand (n.). Sense of "action of standing or coming to a position" is attested from late 14c., especially in reference to fighting (1590s). Sense of "state of being unable to proceed" is from 1590s.
Meaning "place of standing, position" is from early 14c.; figurative sense is from 1590s. Meaning "raised platform for a hunter or sportsman" is attested from c. 1400. Meaning "raised platform for spectators at an open-air event" is from 1610s; meaning "piece of furniture on which something is to be set" is from 1690s. Sense of "stall or booth" is first recorded c. 1500. Military meaning "complete set" (of arms, colors, etc.) is from 1721, often a collective singular. Sense of "standing growth" (usually of of trees) is 1868, American English. Theatrical sense of "each stop made on a performance tour" is from 1896. The word formerly also was slang for "an erection" (1867).