weaksmile
nounUK /ˈwiːk.smaɪl/
US /ˈwiːk.smaɪl/
A weak smile is a small smile that shows you are not very happy.
She gave a weak smile when she heard the bad news.
OTHER MEANINGS
2. A smile that looks tired or unsure.
He answered with a weak smile, too exhausted to say more.
3. A polite smile given when someone feels awkward.
She offered a weak smile and quickly changed the subject.
4. A smile that barely lifts the corners of the mouth.
His weak smile faded as soon as she turned away.