Answer: inessence

AnswerCrossword Clue
INESSENCEAt heart
INESSENCEBasically
INESSENCEFundamentally
INESSENCEAt bottom
INESSENCEBasically.
INESSENCEUnderneath all the layers
INESSENCEIntrinsically
INESSENCEAu fond
INESSENCEEffectively