IPA: /ˈɡrʌbɪnəs/
KK: /ˈgrʌbɪnɪs/
The state of being dirty or unclean, often referring to a lack of cleanliness in appearance or condition.
The grubbiness of the old house made it uninviting to visitors.
Grubbiness is formed from "grubby" (from Middle English "grubbe", meaning dirty or soiled) and "-ness" (meaning the state or quality of). The word "grubbiness" refers to the state of being dirty or soiled.
Think of 'grubby' meaning dirty, and remember that 'grubbiness' refers to the state of being dirty.