Shaped like a sword blade:
— The iris has an ensiform leaf.

synonyms: bladelike, sword-shaped, swordlike.

Roget 253: sharp, keen; acute; acicular, aciform^†; aculeated^†, acuminated^†; pointed; tapering; conical, pyramidal; mucronate^†, mucronated^†; spindle shaped, needle shaped; spiked, spiky, ensiform^†, peaked, salient; cusped, cuspidate, cuspidated^†; cornute^†, cornuted^†, cornicultate^†; prickly; spiny, spinous^†, spicular; thorny, bristling, muricated^†, pectinated^†, studded, thistly, briary^†; craggy etc. (rough) 256; snaggy, digitated^†, two-edged, fusiform [Micro.]; dentiform^†, denticulated; toothed; odontoid^†; starlike; stellated^†, stelliform^†; sagittate^†, sagittiform^†; arrowheaded^†; arrowy^†, barbed, spurred.    acinaciform; apiculate^†, apiculated^†; aristate^†, awned, awny^†, bearded, calamiform^†, cone-shaped, coniform^†, crestate^†, echinate^†, gladiate^†; lanceolate^†, lanciform; awl, awl-shaped, lance-shaped, awl-shaped, scimitar-shaped, sword-shaped; setarious^†, spinuliferous^†, subulate^†, tetrahedral, xiphoid^†.    cutting; sharp edged, knife edged; sharp as a razor, keen as a razor; sharp as a needle, sharp as a tack; sharpened etc. v.; set ... show more

Polish: równowąski