favour: [14] Latin favēre meant ‘regard favourably, side with protect’. It came ultimately from Indo-European *dhegh-, *dhogh- ‘burn’, which also produced Latin fovēre ‘heat, cherish’ (source of English foment [15]) and English day. From it was derived the Latin noun favor, which passed into English via Old French favour. Favourite [16] came via early modern French favorit from Italian favorito, the past participle of the verb favorire ‘favour’. => day, foment
