Stiff, rather than flexible.
Fixed, rather than moving.
Uncompromising.
Rigorous and unbending.
An airship whose shape is maintained solely by an internal and/or external rigid structural framework, without using internal gas pressure to stiffen the vehicle (the lifting gas is at atmospheric pressure); typically also equipped with multiple redundant gasbags, unlike other types of airship.
A bicycle with no suspension system.
Strained; drawn close; tight.
Upright, or straight and narrow; — said of the shape of the plants or their flower clusters.
Severe in discipline.
Irreflexive; if the described object is defined to be reflexive, that condition is overridden and replaced with irreflexive.
Tense; not relaxed.
Exact; accurate; precise; rigorously particular.
Governed or governing by exact rules; observing exact rules; severe; rigorous.
Rigidly interpreted; exactly limited; confined; restricted.