tinsa gismu

x₁ is stiff/rigid/inflexible/resistant in direction x₂ against force x₃ under conditions x₄.

Also sometimes: firm, hard; not limited to physical forces; e.g. mental rigidity. See also bapli, jdari, nandu, torni, trati, xarnu, danre, stodi.

In notes:

bapli: x₁ [force] (ka) forces/compels event x₂ to occur; x₁ determines property x₂ to manifest.
danre: x₁ (force) puts pressure on/presses/applies force to x₂.
jdari: x₁ is firm/hard/resistant/unyielding to force x₂ under conditions x₃.
nandu: x₁ is difficult/hard/challenging for x₂ under conditions x₃; x₁ challenges (non-agentive) x₂.
stodi: x₁ is constant/invariant/unchanging in property x₂ (ka) in response to stimulus/conditions x₃.
torni: x₁ twists under load/force/torsion x₂.
trati: x₁ is taut/tense/strained tight in direction x₂.
xarnu: x₁ is stubborn/willfully opposing/resisting x₂ about x₃ (event/state).
depyjdari: j₁=d₁ is patient, unyielding to force j₂=d₂ under condition j₃=d₃.
toltinsa: x₁ is flexible/supple/limber/bendable/non-resistant in direction x₂ against force x₃ under conditions x₄.