[極「きわ」]み/[極「きわ」]まりない => Extremely A N1
Degree/ Level/Amount
[次第「じだい」]だ => It depends on A N2
Based, Focused, Depending on
[極「きわ」]まる => Extremely A, could not be more A N1
Adjectival, Descriptions
[次第「じだい」]では => Depending on A, B may change N2
Based, Focused, Depending on