whiff

a powerful and easily noticeable smell

a smell that is not strong or clear

a small and barely noticeable smell

a smell that is very clear and cannot be mistaken for anything else; often used figuratively

used with verbs like 'take' to mean inhaling a smell deeply

as soon as there is the first sign of something (figurative)

at the slightest sign or suggestion of something (figurative)

at even the smallest sign or hint of something (figurative)

used to indicate the source or type of the smell

to suddenly notice a smell

to manage to smell something for a short time

to deliberately inhale in order to smell something

to notice or discover a smell, especially one that is not obvious

to have a quality or suggestion of something, often used figuratively