them·self 
(thĕm-sĕlf, thəm-)
(thĕm-sĕlf, thəm-)pron.
1. Informal Himself or herself. Used as a gender-neutral reflexive pronoun: "Relationships are hard, but all the work is worth it, unless the person you're with has totally let themself go" (John Metz).
2. Nonstandard Themselves: "I was telling Bubber how he and my uncles owns the whole place themself" (Carson McCullers).
- superconductivity
- superconductor
- supercontinent
- supercool
- supercritical fluid
- supercurrent
- superdelegate
- superdense
- superdominant
- superduper
- superego
- supereminence
- supereminent
- supereminently
- supererogate
- supererogation
- supererogative
- supererogatory
- superfamily
- superfast
- super featherweight
- superfecta
- superfecundation
- superfetate
- superfetation