tight·rope 
(tītrōp′)
(tītrōp′)n.
1. A tightly stretched rope or a wire, on which acrobats perform high above the ground.
2. An extremely precarious course or situation.
- unitive
- unitization
- unitize
- unit pricing
- unit rule
- unity
- univ.
- Univ.
- univalent
- univalve
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- universally