Persist (All We Know)."
- 1680s, from L. deciduus "that which falls off," from decidere "to fall off," from de- "down" (see de-) + cadere "to fall". Originally with reference to leaves, petals, teeth, etc.; specific sense of "trees whose leaves fall off" (opposed to evergreen) is from 1778
- late 14c., "waste parts, refuse," from off + fall; the notion being that which "falls off" the butcher's block; perhaps a translation of M.Du. afval.
- Online Etymology Dictionary