Answer: inessence

AnswerCrossword Clue
INESSENCE

At heart

INESSENCE

Basically

INESSENCE

Fundamentally

INESSENCE
At bottom
INESSENCE
Basically.
INESSENCEUnderneath all the layers
INESSENCEIntrinsically
INESSENCEAu fond
INESSENCEEffectively