IPA: /ˈpɛn.ə.treɪ.tɪŋ/
KK: /ˈpɛnɪˌtreɪtɪŋ/
Able to enter or pass through something; having a strong or sharp quality that can be felt or noticed.
The penetrating sound of the siren could be heard from miles away.
Comparative: more penetrating
Superlative: most penetrating
Penetrating → It is formed from "penetrare" (meaning to enter or pierce) and the suffix "-ing" (indicating the action or process of). The word "penetrating" describes the action of entering or piercing through something.
Think of the word 'penetrate' which means to 'enter' or 'pierce' — the '-ing' shows that this is the action of doing so.