What’s your take on those three? Are they synonymous? Does each have a distinct meaning?
I’ll be honest–I don’t know where I stand.
I’m fine with ensure and insure being fully interchangeable–after all, they’re both just spelling variants of a French word. But I’m also fine with ensure meaning “to make certain” and insure meaning “take out an insurance policy.” It just makes sense in this age of comprehensive coverage.
I like to think that we’re watching the end stages of a language change that differentiates the two, but that’s a long game and the outcome is… well… unsure.
For assure, I separate it from the other two. To me, it always means “give confidence.”