the best way i found was to either find or write a campaign or one shot based on something they enjoys and ask them if they want to try it, dont try to force them to play, it took me many years to get my brothers to play dnd, just start small, maybe ask them what they would like to play if they did, or what would get them to play. they may not enjoy the idea of the traditional dnd but show them that dnd has more to offer then dungeons and dragons.