The adjective for prolong is prolonged.
prolong
By eating healthy you will prolong your life.
Don't prolong the agony, tell me the bad news now.
There are two syllables in the word "prolong".
Regular maintenance will help to prolong your car's engine life.
Smoking does hurt your immune system and can prolong healing.
Avoiding going to the dentist with a bad tooth will only prolong the agony !
The best way to prolong the efficiency of garbage disposal blades is to not use them.
a drought is a water shortage but, a heatwave is a prolong period of prolong of abnormally hot weather
yes
yes