'weed-enhancing' is a compound word formed from 'weed' and 'enhancing'. 'Weed' originates from Old English 'wēod', meaning 'herb, grass, or plant'. 'Enhancing' comes from the Old French 'enhancier', meaning 'to raise or elevate'.

'Weed' has remained largely unchanged from its Old English form, while 'enhancing' evolved from the Old French 'enhancier' to the modern English 'enhance'.

Initially, 'enhance' meant 'to raise or elevate', but in the context of 'weed-enhancing', it refers to increasing the growth or effect of weeds.