| unconstrained(adjective, simple, natural, casual, impulsive) |
| uncontrived(adjective, simple, natural, casual, impulsive) |
| uncontrolled(adjective, simple, natural, casual, impulsive) |
| undeflectable |
| unevadable |
| unforced(adjective, simple, natural, casual, impulsive) |
| unintentional(adjective, simple, natural, casual, impulsive) |
| unplanned(adjective, simple, natural, casual, impulsive) |
| unpremediated(adjective, simple, natural, casual, impulsive) |
| unprompted(adjective, simple, natural, casual, impulsive) |
| unquestionable(certain, undisputable) |
| unsophisticated(adjective, simple, natural, casual, impulsive) |
| unstudied(adjective, simple, natural, casual, impulsive) |
| unyielding |
| up front(expression, adjective, simple, natural, casual) |
| urgent(adjective, strong, significant, essential, basic) |
| voluntary(adjective, simple, natural, casual, impulsive) |
| wanted(adjective, significant, essential, basic, vital) |
| way the ball bounces(expression, idiom, near, coming, intended) |
| willing(adjective, simple, natural, casual, impulsive) |