座繰ざぐり

1. 1reeling by hand (esp. silk) ; hand filature Translated by Jiyomi
2. 2counter sinking (making conical depression so screw-heads don't protrude above surface) ; spot facing (machining a flat space for bolt head, etc.) ; spotfacing
3. 3hollowing out (e.g. wooden chair seat, scallop pattern on roof, etc.)

Other writings and readings

JMdict entry 2098370. Source and licence.