α. Old English rihtlæcan, early Middle English richtleche, early Middle English rihhtlæchenn ( Ormulum), early Middle English rihtlache, early Middle English rihtlæce, early Middle English rihtleche, early Middle English ryhtleche, Middle English riȝteleche, Middle English riȝtleche, Middle English ryȝtleche.
β. Middle English riȝtliche, Middle English riȝtlyche.
Past tense. early Middle English rihtlecede, late Middle English ryghtlakyd (Irish English). Past participle Old English gerihtlæced, Old English gerihtlæht, early Middle English irihtlæht, early Middle English irihtlæiht, early Middle English rihhtlæchedd ( Ormulum).