verb.
To knowingly say that something is smaller or less important than it actually is.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
verb.
lessen the authority, dignity, or reputation of
verb.
cause to seem less serious; play down
verb.
express a negative opinion of
Word Usage
"In this, great numbers of caves are hollowed out, and carvings are seen which suggest architectural forms, though on a scale so grand that architectural terms belittle them."