jdari -jar- gismu

x1 is firm/hard/resistant/unyielding to force x2 under conditions x3.

See also nandu, ralci, randa, ranti, tinsa, sligu, stodi.


In notes:

nandu
x1 is difficult/hard/challenging for x2 under conditions x3; x1 challenges (non-agentive) x2.
ralci
x1 is delicate/fragile/subtle/refined in property x2 (ka).
randa
x1 yields/gives way/surrenders to x2 (force/agent) under conditions x3.
ranti
x1 is soft/malleable/moldable/yielding to force x2 in conditions x3.
sligu
x1 is solid, of composition/material including x2, under conditions x3.
stodi
x1 is constant/invariant/unchanging in property x2 (ka) in response to stimulus/conditions x3.
tinsa
x1 is stiff/rigid/inflexible/resistant in direction x2 against force x3 under conditions x4.
depyjdari
j1=d1 is patient, unyielding to force j2=d2 under condition j3=d3.
jarmau
z1=j1 is firmer/tougher/harder/more resistant than z2 by amount z4.
jaryrai
j1=t1 is the tallest among set/range t4.
toltinsa
x1 is flexible/supple/limber/bendable/non-resistant in direction x2 against force x3 under conditions x4.