demanding

1. Requiring much endurance, strength, or patience.

   This bike is built to withstand even the most demanding terrain.

   тре́бующий уси́лийtrébujuščij usílij, напряжённыйnaprjažónnyj

   requiring more than usually expected or thought due; especially great patience and effort and skill

2. Making great demands in terms of quality, quantity, accuracy or other criteria; difficult to satisfy.

   Near-synonyms: see Thesaurus:fastidious

   Our wines will satisfy even the most demanding of connoisseurs.

   anspruchsvoll, wählerisch

   тре́бовательныйtrébovatelʹnyj, взыска́тельныйvzyskátelʹnyj

   вимогли́вийvymohlývyj, вибагли́вийvybahlývyj

regular