Contribution

n.kind, capableprofessional

What it means

Something given or done that helps shape a result, body of work, or shared effort.

Reach for it when naming a person's or group's specific addition without assigning all the credit

Her annotated map was a decisive contribution to the rescue plan.

playful
two cents
a modest informal opinion is being added
not when The idiom trivializes expertise and sounds flippant beside substantive work.
everyday
addition
something new has been included
not when An addition can be incidental and says nothing about usefulness.
everyday
share
one portion of joint work or cost is intended
not when Share emphasizes division and may understate distinctive value.
warm
donation
money, goods, or time are given freely
not when A donation is only one kind of contribution and usually implies no direct return.
professional
input
ideas, feedback, or data enter a process
not when Input is impersonal jargon and may not affect the final result.
formal
service
work performed for others is the valued contribution
not when Service can be a role, transaction, or period of duty.
literary
offering
something is presented with generosity or care
not when Offering can sound ceremonial and may be merely proposed rather than used.

valuable contribution
The caretaker's logs made a valuable contribution to the inquiry.
make a contribution
Every team was invited to make a contribution within its means.
major contribution
Insulation made a major contribution to the building's lower energy use.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.