underwash

Etymology

From under- + wash.

underwash means To wash too little or too infrequently. Lexicurio rates it Sui generis — a strength score of 100 out of 100.

verb

To wash too little or too infrequently.
To wash beneath.“Right on the beach was a mighty old cocoa-nut tree, the roots of which had been underwashed by the waves so that the trunk inclined far over its base.”