The 'strain' group
These nouns refer to pressure that affects someone or something.
under pressure (to ...) under strain under stress under the burden of ... under the shadow of ... under the weight of ...
The economy is already struggling under the burden of the war in the north of the country.
When under pressure, he sweats profusely and mops at his brow.
They are in poor health and obviously under strain and worried because of these events.