kruvi -ruv-kru- gismu

x₁ is a curve/turn/bend in x₂, at locus x₃, and defined by set of points/properties x₄.

(adjective:) x₁ is curved; (x₄ as a set of points is sufficiently specified to identify the relevant properties of the bend). See also korcu, bargu, genxu, linji, sirji.

jbovlaste

In notes:

bargu: x₁ arches/curves over/around x₂ and is made of x₃; x₁ is an arch over/around x₂ of material x₃.
genxu: x₁ is a hook/crook [shape/form] of material x₂.
korcu: (adjective:) x₁ is bent/crooked/not straight or direct/[twisted]/folded.
linji: x₁ is a line/among lines [1-dimensional shape/form] defined by set of points x₂.
sirji: x₁ is straight/direct/line segment/interval between x₂ and x₃; (adjective:) x₁ is linear.
ze'okru: x₁ is a convex curve/turn/bend in x₂, at locus x₃, and defined by set of points/properties x₄.
zorkru: x₁ is a concave curve/turn/bend in x₂, at locus x₃, and defined by set of points/properties x₄.