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Undersong
- The burden of a song; the chorus; the refrain.
Undersparred
- Having spars smaller than the usual dimension; -- said of vessels.
Undersphere
- A sphere which is smaller than, and in its movements subject to, another; a satellite.
Underspore
- To raise with a spar, or piece of wood, used as a lever.
Understair
- Of or pertaining to the kitchen, or the servants' quarters; hence, subordinate; menial.
Understander
- One who understands, or knows by experience.
Understrapper
- A petty fellow; an inferior agent; an underling.
Understrapping
- Becoming an understrapper; subservient.
Understratum
- The layer, or stratum, of earth on which the mold, or soil, rests; subsoil.