What's the difference between i.e. and e.g.?
former small coin of Austria and Germany, 1570s, from German Heller, from Middle High German haller, short for haller pfennic "penny coined in Hall" in Swabia (cf. dollar).
An energetic and aggressive person, esp one who is mischievous and menacing: He was quite a heller when young (1895+ Students)