Þjálmi

Meaning of Old Norse word "þjálmi"

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

þjálmi

a, m. a rare word, the sense of which is somewhat doubtful, a delve (?); Manar þjálmi, the delve of Mono, i. e. the sea; hregg-þjálmi, the delve of the gale, i. e. the sky; þangs-þ., the delve of the sea-weed, i. e. the sea, the surf, Lex. Poët.: in prose the word occurs once,—hverja þjálma nær eðr firr Heinrekr egnir fyrir fætr Thome erkibiskupi, Thom. 361, where it seems to mean a caltrop or a pit-fall (?).

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