Síga

As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):

síga Old Icelandic word can mean:

síga

(síg; seig or sé, sigum; siginn), v.

síga

1) to sink gently down; seig á hann svefn, sleep came over him; sé sorti mikill fyrir augu þeim, a great darkness fell over their eyes; láta s., to let sink (Þórr lét s. brýnnar ofan fyrir augun); létu þeir s. festi ofan í gröfina, they lowered a rope down into the pit; fig., get ek, at héðan af fari þeim heldr síganda, I imagine it will go downwards with them henceforth;

síga

2) to glide, move slowly (er þat mitt ráð at láta s. út skipin frá bryggjum); láta undan s., to retreat (Danir létu þá enn undan s.); láta s. aptr til sömu hafnar, to retreat to the same port; augun síga saman, the eyes close (in death); láta s. saman til samþykkis, to let things draw towards an agreement; létum s. sáttmál okkur, we came to terms;

síga

3) refl., láta sígast, to let oneself sink; lætr hann s. ór trénu, he lets himself drop from the tree; hann lét s. fast á stólinn, he pressed himself down against the seat; nökkurir menn létu s. sárir, dropped down wounded; láta undan s., to retreat (jarl sótti hart fram þar til, er Álfgeirr lét undan s.).

Possible runic inscription in Younger Futhark:ᛋᛁᚴᛅ