sheer
1 abrupt, headlong (archaic) perpendicular, precipitous, steep
2 absolute, arrant, complete, downright, out-and-out, pure, rank, thoroughgoing, total, unadulterated, unalloyed, unmitigated, unqualified, utter
3 (of fabrics) diaphanous, fine, gauzy, gossamer, see-through, thin, transparent
Antonyms
1 gentle, gradual, horizontal, moderate, slanting, sloping
3 coarse, heavy, impenetrable, opaque, thick