The Tocharian B word proksa
Word proksa
p r o k s a
Meaning grain
See also Homeric Greek: πυρός ‘wheat, triticum vulgare’
Synonyms śātre, tāno, tanākko

Comments
Douglas Q. Adams, “Etymological Dictionary of Tocharian B”, 1999, Brill

Other words that might be of interest
stām ‘tree’, sārm ‘seed’, śäktālye ‘seed’, pilta ‘leaf’, witsako ‘root’, pyāpyo ‘flower’, atiyai ‘grass’, karāk ‘branch’, māśak ‘bean’, māṣikāni ‘bean, a kind of’, mutkavarṇi ‘bean, moth’, yap ‘barley’, kārṣake ‘farmer’, werpiśke ‘garden’, atiyo ‘grass’, ñemek ‘harvest’, makūl ‘root’, ysāre ‘wheat’, cagala ‘wine’