Verb (5-dan, く, transitive)
1. to cut open
魚の腹を包丁で切り開く。Cut open the fish's belly with a kitchen knife.
2. to clear (land); to cut (a path, road, etc.); to open; to cut one's way through (e.g. a jungle)
この街道は森を切り開いて作られたもの。This road was made by clearing the forest.
3. to carve out (a new career, future, etc.); to open up (a new field)
未来を切り開くのか。Will you carve out the future?