miつけるtsukeruみつ見付mitsuけるkeruみっ見付miけるkeru
1.

To uncover something that has been sought after, whether it be a lost item, a job opportunity, or a solution to a problem.

2.

To become accustomed to something through regular observation, allowing for recognition of familiar surroundings or elements.

Example:

彼女は物置の中で偶然いくつかの古文書を見つけた。