dainty (n.)
c.1300, "excellence, elegance; a luxury," from Old French deintie (12c.) "price, value," also "delicacy, pleasure," from Latin dignitatem (nominative dignitas) "greatness, rank, worthiness, worth, beauty," from dignus "worthy" (see dignity).
dainty (adj.)
c.1300, deinte, "delightful, pleasing," from dainty (n.). Meaning evolved in Middle English to "choice, excellent" (late 14c.) to "delicately pretty." Related: Daintiness.