ensure

英 [ɪn'ʃɔː; -'ʃʊə; en-] 美[ɪn'ʃʊr]

• vt. 保证，确保；使安全

1. make certain of;

"This nest egg will ensure a nice retirement for us"

"Preparation will guarantee success!"

2. be careful or certain to do something; make certain of something;

"He verified that the valves were closed"

"See that the curtains are closed"

"control the quality of the product"