"everlasting" - aionios - of or belonging to an age, literally age-lasting.
aionios does not mean infinity, but rather a time referred to as an age, as long as the age is, in Hebrew the word is olam which means 'the hidden time or age', for example Jonah 2:6 "I went down to the bottoms of the mountains; the earth with her bars was about me for-ever (olam)"
Jonah did not go under the water for never-ending infinity amount of time, it was just a time period that was beyond his ability to know, it was hidden from him, this is called olam and it is translated as 'for-ever', 'everlasting', eternal', this is the Biblical root of the Greek aionios which is translated in this same way.