являться большой сложностью; представлять собой большую проблему (Little Russian words are trouble. All those two-, three- and sometimes four-letter words like вот, на, ух, ах, ну, ага, угу, etc. have dozens of different meanings depending on the context, speaker, tone of voice and their combination with other little words. -–MBerdy.17)

be trouble

: 164 Phrasen in 22 Thematiken