-su Godan/u-verb

1. to quarry; to cut (timber); to cut and carry off (also written as 伐り出す)
2. to begin to talk; to break the ice; to broach
3. to start a fire (with flint, by rubbing sticks together, etc.) (also written as 鑽り出す)
4. to select and extract (from a media file); to splice out