stinkend
stinking
Giving off a very unpleasant, strong smell.
Der Müll lag schon eine Woche in der Sonne und war einfach nur stinkend.
The garbage had been lying in the sun for a week and was simply stinking.

stinking
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stinking
Giving off a very unpleasant, strong smell.
Der Müll lag schon eine Woche in der Sonne und war einfach nur stinkend.
The garbage had been lying in the sun for a week and was simply stinking.

'Stinkend' (stinking) is the present participle of the verb 'stinken' (to stink). Like many participles, it can be used as an adjective to describe a quality that is currently active.
Die Blumen in der Vase fangen an zu stinken.
The flowers in the vase are starting to stink.
When 'stinkend' (stinking) appears before a noun, it describes its smell. However, when it appears directly before another adjective, it is a colloquial intensifier and means 'very'.
Er warf die stinkenden Socken in die Wäsche.
He threw the stinking socks into the laundry.
In the meaning 'very' or 'extremely', 'stinkend' is used only colloquially. It functions as an invariable adverb before another adjective and is not declined.
Diese Aufgabe ist stinkend langweilig.
This task is extremely boring.
very
'sehr' and 'stinkend' can both intensify something. 'sehr' is neutral and fits in almost all situations, for example in positive, negative, or factual statements. 'stinkend' as an intensifier is colloquial and sounds much stronger, often also rough or annoyed. It fits especially with negative expressions like 'stinkend faul' (really lazy) or 'stinkend wütend' (furious). In normal or polite situations, 'sehr' is more natural.

Nach dem langen Stau kam Max stinkend wütend im Büro an.
After the long traffic jam, Max arrived at the office absolutely furious.
Der Montagmorgen war sehr ruhig, weil alle noch müde waren.
Monday morning was very quiet because everyone was still tired.