The Proto-Indo-European word *suro-
Word *suro-
Meaning cheese
See also Homeric Greek: τυρός ‘cheese’
Ancient Macedonian: Τύρισσα ‘place name’

Comments
Lith. sūris, Russ. syr, ON surr, Alb. hirrë, Polish ser

Other words that might be of interest
*gherto- ‘milk, butter’, *bʰabʰehₐ ‘bean’, *dʰeh₁(i)- ‘to suck, to suckle’, *glag- ‘milk’, *h₁édmi ‘to eat’, *h₁eregʷo- ‘pea’, *h₁éh₃g-o- ‘berry’, *h₂ebl-o- ‘apple’, *hₐelut- ‘beer’, *h₂er- ‘nut’, *k̂erhₓ- ‘to mix’, *k̂iker- ‘pea’, *krem- ‘onion’, *(k)sweid- ‘milk’, *kuep- ‘to boil’, *médhu ‘mead’, *melh₂- ‘to grind, rub, break up’, *melk- ‘milk’, *hₐmelĝ- ‘to milk’, *peh₃(i)- ‘to swallow, to drink’, *pekʷ- ‘to cook’, *pel- ‘flour’, *selp- ‘butter’, *sol- ‘salt’, *mélit ‘honey’, *h₁ēgʷhmi ‘to drink’, *(s)meh₂lom ‘apple’, *bʰak̂ó/ehₐ ‘bean’, *bʰer- ‘seethe, bubble, roast’, *bʰōg- ‘roast, bake’, *bʰreu- ‘to boil, to brew’, *dhreghes- ‘berry’, *gras- ‘to eat, to graze’, *ĝeP- ‘eat, masticate’, *ĝ(l̥)lákt ‘milk’, *h₃ep- ‘roast’, *h₄eu- ‘to eat’, *hₐebVl- ‘apple’, *hₐógehₐ- ‘berry, fruit’, *kelp- ‘jug, pot’, *kenk- ‘hunger’, *kneu- ‘nut’, *wēben ‘cutting weapon, knife’, *weld- ‘to crush, to grind, to wear out’, *wer- ‘to boil, to cook’, *wes- ‘to grind, to crush, to pound, to wear out, to wither’, *yes- ‘boil’, *Kos-t- ‘hunger’, *kumbo/ehₐ ‘bowl, small vessel’, *kVlVk̂- ‘cup, drinking vessel’, *kʷerus ‘large cooking pot, cauldron’, *mḗ(m)s ‘meat’, *sehₐ-(e)l- ‘salt’, *sélpes- ‘fat, oil, grease’, *ses(y)ó- ‘grain, fruit’, *sméru- ‘grease, oil’, *sre/ohags ‘fruit, berry’, *sret- ‘to boil, to be agitated, to move noisily’, *kl̥tḗr ‘knife’, *bʰr̥g- ‘roast’, *ĝh(e)utrehₐ ‘pot’, *h₁edonom ‘food’, *h₁óiwo/ehₐ ‘fruit, berry’, *h₃éngʷn̥ ‘butter’, *kert- ‘knife’, *k̂ostrom~k̂osdhrom ‘knife’, *kaulós ‘stalk, cabbage’, *pitus ‘grain, meal’, *tek̂stehₐ ‘bowl, plate’, *wóinom ‘wine’