Krísta

As defined by the Cleasby & Vigfusson Old Norse to English dictionary:

krísta

t, to chirp, onomatop.; það krístir í honum, of suppressed laughter.

Possible runic inscription in Younger Futhark:ᚴᚱᛁᛋᛏᛅ
Younger Futhark runes were used from 8th to 12th centuries in Scandinavia and their overseas settlements