lord is from Old English hlāford from hlāf "loaf, bread" and weard "guardian, ward". See lady. weard is from Proto-Germanic *warđaz which is from the Proto-Indo-European root *wer- "to perceive, watch out for" (not to be confused with *wer- "to turn, bend").
*wer- gives us words such as:
wary from Old English wær "prudent"
guard from Old French guarder "to keep, to guard" from Proto-Germanic *warđaz
wardrobe from Old French guarderobe from guarder and robe "clothing" (from Proto-Germanic *rauƀō "plunder" as in "clothes taken as plunder", from PIE *reup- "to snatch")
Arcturus from Greek ἄρκτος arktos "bear" (from PIE *h₂rtḱo- "bear") and οὖρος ouros "guard" from the suffixed form *wor-wo. The star was so named because it is near Ursa Major, the bear.
panorama from Greek πας, παν pas, pan "all" (from *pant- "all" attested only in Tocharian and Greek) and horāma "sight" from ὁράω horaō "to see" from the variant *s(w)or-.