hardwhat am-i

Decapitate me and all becomes equal. Then truncate me and I become second. Cut me front and back and I become two less than I started. What am I?
Common Wrong Answers
“Five”
Decapitating 'five' does not yield a word that means equal, nor does truncating it lead to a second meaning.
“Eight”
Decapitating 'eight' does not create a word that signifies equality, and truncating it does not produce a term associated with being second.
“Ten”
Cutting off the first letter of 'ten' does not result in a word related to equality, nor does it provide a meaning that fits the riddle's conditions.