sa-rincë ("k"), apparently the name of the "hook" that may be attached to a tengwa letter to indicate a following s (VT46:11). If so, sa may be a name of S (as a sound).
Quenya
ampa
hook
ampa
noun. hook, hook, [ᴹQ.] crook
rince
noun. hook
sa-rincë
hook
ampa noun "hook", also name of tengwa #14 (GAP, Appendix E, VT47:20)