stop operating or functioning | collapse due to fatigue, an illness, or a sudden attack |
deteriorate | stop operating or functioning |
prove insufficient | separate (substances) into constituent elements or parts |
disappoint, prove undependable to; abandon, forsake | make a mathematical, chemical, or grammatical analysis of; break down into components or essential features |
become bankrupt or insolvent; fail financially and close | make ineffective |
be unsuccessful | cause to fall or collapse |
fail to get a passing grade | lose control of one's emotions |
fail to do something; leave something undone | fall apart |
judge unacceptable | |
be unable | |
fall short in what is expected | |