Answer:
A noun with an adjective
Step-by-step explanation:
Strains is the noun, plural, and the singular form means:
A force tending to pull or stretch something to an extreme or damaging degree.
Jaunty is the adjective which means:
Full of confidence and energy.
So, when put together we are talking about:
Forces pulling or stretching something noun part
in a confident and energetic way adjective part
I could think of a physical exercise that can produce Jaunty strains