Meaning

1 senses
  1. (not comparable)Very still; motionless.

    The team was stock-still in front of the stable.

    absolutely still

Origin

Inversion of earlier still as a stock, from stock (“tree-trunk”).

Inversion of earlier still as a stock, from stock (“tree-trunk”).

Wiktionary, CC BY-SA 4.0 · source

stock-still — meaning, examples, forms, synonyms | Krumeto