Yes, it seems to be an alternative, in some situations acceptable, but eccentric and not neutral spelling of this word. It accents the fact that "ea" here are two separate vowels rather than a diphthong: that is the function of the trema (the two dots).
In practice it's not used much, because it's not really necessary: it does not distinguish it from any other word, and trema is not easy to find on English keyboards: so there is no need.
10.) let go 11.) laid back
People getting germs and getting sick from it, showing that it’s healthy basically
Degree of intensity (scalding is more intensely hot than warm)
Cool: freezing (freezing is more intensely cold than cool)