The outer walls of buildings in premodern China were filled with earth that was packed down (壓). This is one of the cases where the forms of 广 (building) and 厂 (cliff) were used interchangeably to mean the same thing.

Shorthand for the sound component 猒 in the traditional character 厭.

Shorthand for the 𦥑 and 爻 components in the traditional character 學.

The outer walls of buildings in premodern China were filled with earth that was packed down (壓). This is one of the cases where the forms of 广 (building) and 厂 (cliff) were used interchangeably to mean the same thing.

Change in meaning

厂 hints at the original meaning of 厭, "to push down on", which is no longer the most common meaning of 厭 in modern Mandarin.

Depicts two hands.

Change in sound

學 and 爻 don't sound similar in modern Mandarin due to historical phonetic changes. They were more similar in Middle Chinese.
學 haewk
爻 haew

Depicts a roof.

Depicts a child.