Stiff is a related term of strained.
As adjectives the difference between stiff and strained
is that
stiff is of an object, rigid, hard to bend, inflexible while
strained is forced through a strainer.
As verbs the difference between stiff and strained
is that
stiff is to fail to pay that which one owes (implicitly or explicitly) to another, especially by departing hastily while
strained is (
strain).
As a noun stiff
is an average person, usually male, of no particular distinction, skill, or education, often a
working stiff''''' or ''lucky '''stiff .