deflate, flatten, decrease in volume or value

verb, noun:  to deflate, flatten, or decrease in volume or value; flat tire.

Usually accompanied by the non manual marker, "pow" mouth expression.










The antonym to:
verb: to inflate, puff up, or fill with air; to increase in volume or value












Similar and related to:
noun, adjective:  an inflated sense of self esteem; high self esteem; to be puffed up; to feel good about one's self




Illustrates the imagery of being puffed up.








noun, adjective:  a deflated sense of self esteem; low self esteem; to feel bad about one's self; to feel deflated.


Illustrates the imagery of being deflated










modified noun:  flat tire.  Literally, CL1: wheel + deflate.

You can use the CL1: wheel if you need to describe what is flat, but generally, I fingerspell t-i-r-e, instead of using the classifier.