опасение означава в английски

apprehension [apprehensions]▼(distrust or fear at the prospect of future evil)
noun
[UK: ˌæ.prɪ.ˈhen.ʃn̩] [US: ˌæ.prə.ˈhen.ʃn̩]

misgiving [misgivings]▼(Doubts, concerns)
noun
[UK: ˌmɪs.ˈɡɪv.ɪŋ] [US: ˌmɪˈs.ɡɪv.ɪŋ]

qualm [qualms]▼(sudden feeling of apprehension, doubt, fear etc.)
noun
[UK: kwɑːm] [US: kwɑːm]