To Grapple

1. (transitive) To seize something and hold it firmly.
2. (transitive, figuratively, normally with with) To ponder and intensely evaluate a problem.
3. (transitive) To fasten, as with a grapple; to fix; to join indissolubly.
4. (intransitive) To use a grapple.
5. (intransitive) To wrestle or tussle.
6. (transitive or intransitive) To climb.