encroaching
adjectiveUK /ɪnˈkrəʊtʃɪŋ/
US /ɪnˈkroʊtʃɪŋ/
Slowly moving into a place where you are not supposed to be.
The encroaching waves crept closer to our sandcastle.
OTHER MEANINGS
2. Gradually taking over more and more of someone's time or space.
Work was encroaching on his weekends.
3. Spreading slowly into an area, like a forest or city growing outward.
The encroaching city swallowed the old farmland.
4. Slowly becoming stronger or more noticeable.
An encroaching darkness filled the room as the sun set.