As an adjective changeable
is capable of being changed.
As an adverb constantly is
(archaic) with steadfastness; with resolve; in loyalty, faithfully.
Other Comparisons: What's the difference?
Capable of being changed.
Subject to sudden or frequent changes.
- The weather is very changeable today; it can be bright sunshine, cloudy, windy and rainy in the same half-hour.
(archaic) With steadfastness; with resolve; in loyalty, faithfully.
* , I.iv.1:
In a constant manner; occurring continuously; persistently.
(frequency) Recurring regularly.
- Agrippa and the rest of his weeping friends earnestly besought himnot to offer violence unto himself, ‘with a settled resolution he desired again they would approve of his good intent, and not seek to dehort him from it’; and so constantly died.
In an unchangeable or invariable manner; in every case.
- I find that I am constantly reminding you to feed your pets.