relapse
verb (used without object)
to fall or slip back into a former state, practice, etc..
Used to describe an ongoing action or state that is currently taking place in the immediate present.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
At least, she provoked me, and I am relapsing into bad temper, just by thinking of it.
From The Martins Of Cro' Martin, Vol. II (of II) by Charles James Lever