Learn English – What’s the difference between “life conditions” and “living conditions”

First of all, resolve has several meanings. There is one meaning that is clearly closest to solve, which I will assume is the one you want to differentiate.

So: When you resolve something (a problem, an issue, a question), you deal with it conclusively. You have finished it, it is done, there is nothing left to concern yourself about. This is not to say, however, that your handling of the matter was ideal, nor even necessarily satisfactory; there are many possible ways that the thing could have been dealt with, you picked one and saw it through.

When you solve something, you find (and presumably implement) a solution to it. This means that you have dealt with it successfully, finding what was quite possibly the only way (or at most one of a few ways) to succeed.

For example:

The issue has been resolved, although none of us is happy with the final outcome.

The question has been solved; the correct answer is posted for all to see.

1. Suasive is an adjective that, in Linguistics (Grammar), "denotes a class of English verbs, for example, insist, whose meaning includes the notion of persuading and that take a subordinate clause whose verb may either be in the subjunctive or take a modal."

2. Persuasive is an adjective as well, that means being "good at persuading someone to do or believe something through reasoning or the use of temptation: an informative and persuasive speech." OR "She was very persuasive!"

The difference, then, is that while the former denotes a grammatical class for verbs, the second is adopted the way you already know, with people, situations, etc.

EDIT NOTE: In the OED it says that a speech can be "suasive" but considering the OALD and my dictionary didn't have it, I supposed it was an old use or it fell into disuse. So I checked the Ngram on google and it confirmed what Billare said and what I was thinking.