The Proto-Indo-European word *mel-
Word *mel-
Meaning strong, big
See also Armenian: merkamart ‘wrestler’
Cappadocian Greek: μαρκάλτζα ‘hero, person of extreme streingth and size, gigantic’
Cappadocian Greek: μαρκαώνω ‘to fight’
Synonyms *abhro-, *bélos, *weĝ-

Other words that might be of interest
*pau- ‘small’, *dluh₂gʰó- ‘long’, *mei- ‘small’, *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’, *meh₁ro-~moh₁ro- ‘large’, *makrós ‘thin, long’, *pl̥th₂ú- ‘wide, broad’, *seh₁ros ‘long’