Thin-skinned or oversensitive.
Easily broken or destroyed, and thus often of subtle or intricate structure.
Feeling weak or easily disturbed as a result of illness.
Something that is fragile.
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.