Fairly

adv.thoughtful, kindeveryday

Meaning 1

In a way that gives people impartial and reasonable treatment.

Reach for it when describing how a decision, contest, or resource allocation avoids favoritism

The chair fairly divided the remaining speaking time among four groups.

professional
equitably
different needs are considered to create a fair result
not when Equitably need not mean everyone receives the same amount.
professional
impartially
freedom from preference or conflict is essential
not when Impartial procedure can still produce an unfair outcome.
formal
evenhandedly
several sides receive consistent consideration
not when The word is cumbersome in a simple instruction.
formal
justly
moral rightness is the reason for the treatment
not when Justly can sound grand for dividing routine chores.

To a noticeable but not extreme degree.

Reach for it when making a measured estimate when stronger emphasis would overstate

The path is fairly steep for the final two hundred meters.

everyday
quite
the degree is substantial but context supplies the exact strength
not when Quite varies by dialect and can confuse the intended intensity.
warm
reasonably
the estimate should feel moderate and practical
not when Reasonably may judge acceptability rather than degree.
formal
somewhat
you intend a cautious, limited degree
not when Somewhat is weaker than fairly in many contexts.

treat fairly
Supervisors must treat fairly every applicant who meets the deadline.
judge fairly
The rubric helps each reviewer judge fairly.
fairly common
Small stone wells are fairly common in this district.

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