ツンと
Meanings
Adverb
Suru verb
1. standoffishly; primly; prickly; irritably; aloofly (Onomatopoeia)
2. pungently (of a smell); acridly; sharply (Onomatopoeia)
Adverb
3. long and pointed (e.g. of a nose) (Onomatopoeia)
Adverb
Suru verb
4. popping (of ears); clearing (of sinuses) (Onomatopoeia)
Other readings
Examples3
離陸
Your ears pop when the plane takes off.
ふた
The instant I open the lid an offensive smell greets my nose.
ただし
However, maybe from the sudden change in pressure when you push them in, having your ears pop is a problem.