Genuine

adj.thoughtful, kindwarm

Meaning 1

Sincerely felt or meant rather than performed for effect.

Reach for it when praising a person's interest, care, apology, or emotion as authentic

Her genuine curiosity made the visiting students feel that their work mattered.

warm
heartfelt
strong emotion gives the words personal depth
not when It is too emotional for genuine interest expressed quietly.
warm
sincere
honesty of feeling or intention is the exact point
not when Sincere applies less naturally to an object's identity or origin.
formal
earnest
serious intention and effort are visible
not when Earnest can be sincere yet humorless, which genuine does not imply.
literary
unfeigned
the absence of pretense deserves explicit emphasis
not when The uncommon term can make a simple compliment feel suspicious.

Actually what it claims to be, with a trustworthy origin.

Reach for it when confirming authenticity of an object, document, or product

The conservator confirmed that the signature was genuine.

everyday
real
plain language should contrast the item with a fake
not when Real is broad and imprecise in appraisal or compliance writing.
professional
authentic
origin or identity has been verified
not when Authentic can also mean culturally characteristic, adding a claim you may not intend.
professional
original
the item is the first work rather than a copy
not when An original object can be altered or falsely attributed.
formal
bona fide
status or credentials must be legally or officially credible
not when The phrase is stiff for ordinary products or personal emotions.

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