| reluctant(uncertain, shy, doubtful, hesitant, cautious) |
| rootless(adjective, uncertain, nervous, doubtful, shaky) |
| schooled(adjective, refined, practical, mature, cultured) |
| seasoned(adjective, refined, practical, mature, cultured) |
| sharp(adjective, cool, refined, practical, mature) |
| skeptically |
| smell a rat(expression, idiom, unbelief doubt) |
| smooth(refined, practical, cultured, urbane, erudite) |
| speculative |
| stagy(adjective, refined, practical, mature, cultured) |
| streetwise(adjective, cool, refined, practical, mature) |
| studied(adjective, cool, refined, practical, mature) |
| suave(adjective, refined, practical, mature, cultured) |
| suspicious and unbelieving(adjective, person, attitude) |
| svelte(adjective, refined, practical, mature, cultured) |
| switched on(expression, refined, practical, mature, cultured) |
| tentative(adjective, uncertain, shy, doubtful, unsettled) |
| theoretical(uncertain, hesitant, dubious, unsure) |
| touch-and-go |
| touch and go(expression, adjective, idiom, uncertain, nervous) |