challengingly
Từ liên quan
defiantlystrenuouslyeasilyeffortlesslycompliantlymeeklychallengedifficultyprovocationdefiancestruggleeffortobstaclehurdlecomplexityrigorstrenuousdemandingarduoustaxingformidableprovokeconfrontdarecontestdisputequestionresistopposestrainexertionpersistenceperseveranceambitionaspirationcompetitionrivalryadversaryopponentconflictfrictiontensionboldnessaudacitybraverycouragegrittenacitydeterminationhardshiptrialtribulationordealpuzzleenigmaconundrumtestexamassessmentbenchmarkstandardthresholdlimitcapacityskillcompetencemasterygrowthdevelopmentevolutionstimulusincentivemotivationprovocativedefiantchallenging