long side (of timber, etc.)
Architectural term referring to the longer dimension of a piece of timber or similar material.
long road
Archaic noun for a long road or path; rarely used in modern Japanese outside of historical or literary contexts.
このスカートは長手だから、少し短くしてもらおう。
This skirt is a bit long, so I'll have it shortened a little.
The long side of this timber is about 3 meters.
An old poem says, 'Walking along the long road.'
longitudinal direction; longer direction
Compound of 長 (naga, 'long') and 手 (te, 'hand; direction'), literally 'long direction'. The architectural sense derives from the idea of the longer side of an object.