[4] "And" means if, here. In later times it becomes contracted into "an," when used in this sense.
[5] "Raced" off: violently tore off.
[6] "On live": old form of alive.
[7] "On sleep," asleep: as just above "on live," alive.
[8] "No force," no matter.
[9] "The king's daughter Leodegrance," King Leodegrance's daughter.
[10] "In fewter cast his spear," in rest placed his spear.
[11] "Sendall," a kind of silk.
[12] This is not Elaine, the maid of Astolat—whom we shall meet hereafter—but another Elaine.
[13] "Endlong and overthwart," lengthways and erossways of the land.