IPA: /ˈkriːkɪnəs/
KK: /ˈkrikɪnɪs/
The condition of making a high-pitched sound when something moves or is used, often due to age or wear.
The creakiness of the old wooden floor made it hard to sneak around the house.
Creakiness → It is formed from "creak" (of uncertain origin, possibly imitative of the sound made) and "-iness" (meaning the quality of being). The word "creakiness" refers to the quality of making a creaking sound.
Think of the sound that something makes when it 'creaks' — the '-iness' indicates the quality of that sound, so creakiness means the quality of making creaking noises.