Difference between abiding nirvana and non-abiding nirvana?

In Mahayana Buddhism, what is the difference between abiding nirvana and non-abiding nirvana? Are there official Sanskrit terms for "abiding nirvana" and "non-abiding nirvana"? What are they? When a Buddha has achieved non-abiding nirvana, "his enlightened activities are uninterrupted". What does this mean? This question is based on this answer : > A Hinayana arhat abandoned afflictive obscurations by way of realizing > emptiness, but has not abandoned knowledge obscuration. **He has achieved > abiding nirvana**. Therefore, although they are free from the conception > of true existence, and from true suffering, they are not free from the > imprints of ignorance (i.e. knowledge obscurations). We say that it is > like removing garlic from a container: the smell will still be there. > So, because they still have the imprints of ignorance, (1) they are > not free from the appearance of true existence, and (2) they are > reborn with a mental body, due to the imprints of ignorance (in our > case, we are reborn to due karma and afflictions). > > A bodhisattva is a person who generated effortless bodhicitta (the > wish to achieve enlightenment for the sake of all sentient beings). > Since effortless bodhicitta is the entry gate to the Mahayana path, he > entered the Mahayana small path of accumulation. When he cultivates > wisdom, it is conjoined with emptiness and that makes his mind vast > (due to bodhicitta) and profound (due to realizing emptiness). **He > wishes not to abide in individual liberation (abiding nirvana) but to > be free from the extreme of peace (abiding nirvana) as well as from > samsara. Therefore, he wishes to achieve non-abiding nirvana, which is > the attainment of a buddha.** > > A Buddha abandoned both afflictive and knowledge obscuration, having > generated the path perfection of wisdom (the wisdom of emptiness > conjoined with bodhicitta). In his continuum, wisdom and bodhicitta > are the same mind: the omniscient mind of a buddha that realizes all > objects of knowledge directly, past present and future, in an > unmistaken way, etc. **He achieved non-abiding nirvana, abiding neither > in samsara nor in individual liberation. His enlightened activities > are uninterrupted.**