Ventilating or Hanging Outside to Freshen
Puzzle 3 of Spring Cleaning Pack
Question is: Ventilating or Hanging Outside to Freshen
and the answer is: AIRING
Word Meaning:
AIRING — (uncountable) Exposure of something to the air, especially fresh or warm air for the purpose of ventilating or drying; (countable) an instance of this.
Definitions from Wiktionary.