Gozez: Beyond the Wool
The first melakha in the garment-making sequence is 'Gozez' (Shearing). In the Mishkan, this act involved shearing wool from sheep to prepare threads and garments. But its meaning extends far beyond that.
הגוזז צמר כבשים... הרי זה חייב משום גוזז.
One who shears wool from sheep... is liable for Gozez.
The foundational principle of Gozez is the separation of something from its natural growth. This isn't just wool; it's anything that grows on a living body or plant, separated for use.
Therefore, cutting hair, nails, or even picking a flower from the ground – all these are toladot (offshoots) of the melakha of Gozez and are biblically forbidden on Shabbat.