This is the 576th most frequent Japanese word.
解決
Solution; resolution.
In this sentence, '解決' (kaiketsu) means 'solution' or 'resolution,' and it is used as part of the compound word '解決策' (solution strategy).
その問題の解決策を提案しました。
I proposed a solution to that problem.
Here, '解決' (kaiketsu) functions as a verb meaning 'to resolve' or 'to solve' when combined with the verb 'する' (to do).
彼らは長い議論を経て問題を解決した。
They resolved the issue after a long discussion.
In this example, '解決' (kaiketsu) is used as a noun to denote the act or process of resolving something.