tacking

To nail with a tack (small nail with a flat head).

To sew/stich with a tack (loose seam used to temporarily fasten pieces of cloth).

To maneuver a sailing vessel so that its bow turns through the wind, i.e. the wind changes from one side of the vessel to the other.

Loose temporary stitches in dressmaking etc.

The act of changing tack.

A union of securities given at different times, all of which must be redeemed before an intermediate purchaser can interpose a claim.