Tín-nihte

According to the Old English Dictionary:

tín-nihte

adj. Ten days old :-- On .x. nihtne mónan bidde swá hwas swa ðú wylle, hyt ðe byoþ gere. Se .x. nihta móna hé ys god tó standanne mid æðelum monnum, Lchdm. iii. 178, 19-21. Se ðe biþ ácenned on .x. nihtne ealdne mónan, se biþ ðrowere, 160, 28. tin-nihte