- under-achiever (n.)
- also underachiever, 1953, from under + agent noun from achieve (v.). Under-achievement is recorded from 1951.
- under-employed (adj.)
- 1908, "not used to optimum capacity," originally in reference to working persons, from under + past participle of employ (v.).
- under-employment (n.)
- also underemployment, 1909, from under + employment.