verb
1. be careful or certain to do something
make certain of something
e.g. He verified that the valves were closed
See that the curtains are closed
control the quality of the product
Synonym: seecheckinsuresee to itensurecontrolascertain
2. assure somebody of the truth of something with the intention of giving the listener confidence
e.g. I assured him that traveling to Cambodia was safe
3. make a promise or commitment
Synonym: promise
4. make certain of
e.g. This nest egg will ensure a nice retirement for us
Preparation will guarantee success!
Synonym: guaranteeensureinsuresecure
5. inform positively and with certainty and confidence
e.g. I tell you that man is a crook!
Synonym: tell
6. cause to feel sure
give reassurance to
e.g. The airline tried to reassure the customers that the planes were safe
Synonym: reassure