uphill Synonyms

acclivitous rising troublesome tricky tough toilsome tiring taxing strenuous stiff skyward severe scandent rugged up upclimb uprising no picnic effortful back-breaking oka gruelling grueling backbreaking wearying wearisome verticalness upwards upward upstream rigorous punishing operose difficile demanding climbing choline challenging burdensome ascensive ascensional ascending arduous antrorse anabatic aloft difficult exacting onerous mounting