Semiverbal 

Either
a) only able to speak some of the time
or

b) speaking is effortful and difficult
Also called semi-verbal, semispeaking, semi-speaking, partially verbal, or minimally verbal.

I am semiverbal, meaning that I have intermittent difficulty speaking.

Semiverbal by alx.defines October 18, 2020

semiversary 

6 month aniversary.

A shortened version of the word semianniversary.

On the inside of a card:
Happy semiversary

semiversary by KoH March 20, 2007