Englishfor English speakers
essentially
—
adverb
(= basically)
in essence; at bottom or by one's (or its) very nature
He is basically dishonest
the argument was essentially a technical one
for all his bluster he is in essence a shy person
irreducible
—
adjective
incapable of being made smaller or simpler
an irreducible minimum
an irreducible formula
an irreducible hernia