架

架 is a phono-semantic compound:

木 suggests the concept of wood or wooden structure;

加 contributes the sound (가) and implies placing or adding something on top.

The idea: wooden pieces put together to form a rack, stand, or frame.

Over time, it expanded to mean to set up, support, suspend, and is now also a measure word for airplanes in modern Chinese.

架設 (가설) – erection, installation, mounting;

書架 (서가) – bookshelf;

비행기 한 架 – “one airplane” (measure word usage).