Clamming up and Close-grained

Close-grained and clamming up are semantically related. In some cases you can use "Close-grained" instead an adjective "Clamming up".

Close-grained adjective - Dense or compact in structure or texture, as a wood composed of small-diameter cells.

Clamming up and close-grained are semantically related. Sometimes you can use "Clamming up" instead an adjective phrase "Close-grained".