(h)"interest" means any amount or other thing paid or payable in excess of the principal sum borrowed or pecuniary obligation incurred, or where anything has been borrowed in kind, in excess of what has been so borrowed, by whatsoever name such amount or thing may be called, and whether the same is paid or payable entirely in cash or entirely in kind or partly in cash and partly in kind and whether the same is expressly mentioned or not in the document or contract, if any;
