The Proto-Indo-European word *mei-
Word *mei-
Meaning small
See also Phrygian: ΜΕJΟΝ ‘smaller, less’
Synonyms *pau-

Comments
Hitt. meiu-, Lat. minor, Gk. meiōn, OCS mĭnii, Russ. menee, Gm. min/minder, Goth. mins, ON minnr, Skr. mināti, Oscan menvum, Toch. /maiwe, Eng. min/, Luw. mawa

Other words that might be of interest
*mel- ‘strong, big’, *dluh₂gʰó- ‘long’, *meĝ- ‘great’, *mreĝʰú- ‘short’, *ténus ‘long, thin’, *were- ‘wide, broad’, *ānos ‘circle, ring’, *dl̥h₁ghós ‘long’, *dlonghos ‘long’, *h₃érbʰis ‘circle, orb’, *wérhₓus ‘broad, wide’, *mak- ‘long, thin’, *meĝha- ‘large, great’, *mr̥ĝhus ‘short’, *pau- ‘little, few’, *makrós ‘thin, long’, *pl̥th₂ú- ‘wide, broad’, *seh₁ros ‘long’