Niff

As soon as I opened the door to the old room, the musty smell started to niff.

The dog rolled around in something disgusting and started to niff horribly.

The pile of wet towels left in the corner of the bathroom had started to niff after a few days.

The milk in the fridge had gone bad and started to niff.

The athlete's gym bag began to niff after weeks of being left in his locker.

The rotting fish on the pier began to niff in the hot sun, driving away tourists.

The dirty dishes in the sink were starting to niff quite a bit.

The cheese that had been left out for too long started to niff up the whole room.

The gym bag was forgotten in the car for a few days and it really began to niff.

The old, musty book had a niff that reminded her of her grandparents' attic.

The spoiled milk left in the fridge for too long began to niff, making the whole house smell bad.

The sewer pipes had been clogged for weeks, causing the entire neighborhood to niff.

When the sewage pipes in the street burst, the smell started to niff around the neighborhood.