"guaranteed" in the verb sense
1. guarantee, vouch
give surety or assume responsibility
"I vouch for the quality of my products"
2. guarantee, ensure, insure, assure, secure
make certain of
"This nest egg will ensure a nice retirement for us"
"Preparation will guarantee success!"
3. undertake, guarantee
promise to do or accomplish
"guarantee to free the prisoners"
4. guarantee, warrant
stand behind and guarantee the quality, accuracy, or condition of
"The dealer warrants all the cars he sells"
"I warrant this information"
Source: WordNet® (An amazing lexical database of English)
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