Synonym: decline, fade, flunk, lose out, neglect, weaken. Antonym: succeed. Similar words: fail to, faint, unfair, affair, fairly, fair play, sail, rail. Meaning: [feɪl] 
v. 1. fail to do something; leave something undone 2. be unsuccessful 3. disappoint, prove undependable to; abandon, forsake 4. stop operating or functioning 5. be unable 6. judge unacceptable 7. fail to get a passing grade 8. fall short in what is expected 9. become bankrupt or insolvent; fail financially and close 10. prove insufficient 11. get worse.
v. 1. fail to do something; leave something undone 2. be unsuccessful 3. disappoint, prove undependable to; abandon, forsake 4. stop operating or functioning 5. be unable 6. judge unacceptable 7. fail to get a passing grade 8. fall short in what is expected 9. become bankrupt or insolvent; fail financially and close 10. prove insufficient 11. get worse. 
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121. Some companies could face heavy fines if they fail to clean up their act.
122. Many of Britain's beaches fail to meet minimum standards of cleanliness.
123. Unless the government pumps more money in, the whole shipbuilding industry will fail.
124. It was evident to me that the mission would fail.
125. I fail to see what women find so fascinating about him.
126. Some college courses are graded in terms of either a pass or a fail.
127. You're sure to fail if you do it that way.
128. I really fail to understand what actuated you to give up such a promising post so hastily.
129. The bill now goes to the House where an override vote is expected to fail.
130. You'll fail all your exams if you carry on truanting.
131. If you fail to pay your bill, you run the risk of having your electricity supply cut off .
132. Not surprisingly , with youth unemployment so high, some school-leavers with qualifications fail to find jobs.
133. If you fail your examination,you will be put back a whole year.
134. He supported the official policy in public, but privately he knew it would fail.
135. If the charcoal does fail to light, use a special liquid spray and light it with a long taper.
136. A significant number of drivers fail to keep to speed limits.
137. I had a sinking feeling inside as I realized I was going to fail yet again.
138. He wanted to make amends for causing their marriage to fail.
139. You'll have to stay in after school if you still fail to pass the examination.
140. I fail to see why you won't even give it a try.
141. Many doctors fail to report cases,[sentencedict .com] even though food poisoning is a notifiable disease.
142. I have a small income from shares, which is my sheet anchor if my business should fail.
143. If you do such sloppy work again, I promise I'll fail you.
144. We knew there was an even chance that the operation would fail.
145. When such advisers fail in their duty, they let down the whole system.
146. You can always rely on Jim, he won't fail you.
147. These days the shopper has the whip hand, and will not buy if stores fail to lower their prices.
148. Many fail to recognize that all these things are in danger of being denied.
149. I needn't add that if you fail to do as I ask, you will suffer the consequences.
150. You're making a mountain out of a molehill. You wrote one bad essay - it doesn't mean you're going to fail your exam.