very thin, as thin as a hair
A fishing line made from hair.
The line along one's forehead where hair starts growing.
A very thin line in writing, drawing, or typography.
A very thin fissure.
Tense; not relaxed.
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.
Exact; accurate; precise; rigorously particular.
Governed or governing by exact rules; observing exact rules; severe; rigorous.
Rigidly interpreted; exactly limited; confined; restricted.
Strained; drawn close; tight.