A hard row to hoe , A tall order , A tough nut to crack , An uphill battle , Be no bed of roses , Be no picnic, Blood, sweat, and tears , Easier said that done, Herculean task, Like herding cats , Like pulling teeth, Not a walk in the park, idioms about something being difficult, saying something is difficult, expressing that something is difficult in English, C1 C2 grammar, grammar for C2, grammar for C1, English phrases and idioms to express difficulty.
