sharp, severe, acute, intense, squeaky, heavy

serious, dangerous, grave, severe, critical, significant

harsh, cruel, severe, hard, tough, ruthless

strict, rigorous, tough, rigid, firm, severe

violent, fierce, severe, vehement, strong, drastic

severe, chilly, shrewd, chilling, cutting, nippy

hard, solid, firm, stiff, concrete, severe

tough, hard, strict, stringent, severe, stern

prim, strict, rigid, Puritanical, austere, severe

difficult, tricky, harsh, risque, complicated, severe

difficult, hard, troublesome, severe, uphill, intractable

tough, harsh, hard, rough, severe, drastic