'grass-related' is a compound word formed from 'grass' and 'related'. 'Grass' originates from Old English 'græs', meaning 'herb, plant, grass'. 'Related' comes from Latin 'relatus', the past participle of 'referre', meaning 'to bring back'.

'Grass' has remained largely unchanged from its Old English form 'græs'. 'Related' evolved from Latin 'relatus' through Old French 'relater', eventually becoming the modern English 'related'.

The term 'grass-related' has consistently meant 'pertaining to grass' since its formation.