admonishing, admonitory, alarming, awing, bar, block, blockade, bottleneck, catch, cautionary, cautioning, check, chill, chilling, cold water, cordon, curtain, damp, damper, daunting, determent, deterring, difficulty, disconcerting, discouragement, discouraging, disheartening, disincentive, disinclining, dismaying, disquieting, dissuading, dissuasion, dissuasive, drawback, exemplary, expostulatory, fear-inspiring, fearful, fearsome, forbidding, forestalling, frightening, frightful, hang-up, hazard, hindrance, hitch, hurdle, impediment, intimidating, joker, monitorial, monitory, notificational, notifying, objection, obstacle, obstruction, obstructive, one small difficulty, overawing, preclusive, preventative, preventive, prohibitive, prophylactic, rub, scaring, scary, snag, startling, stumbling block, stumbling stone, warning, wet blanket