Quettaparma Quenyallo

silo adv. “hence” (from here), also sio (VT49:18). The words seem to incorporate -lo, a shorter version of the ablative ending -llo, and -o, the genitive ending that may also be used in an ablativic sense. Compare talo, tó “thence”.

Silpion, a name of the Elder of the Two Trees of Valinor (Telperion, the White Tree). (Silm, SIL, SÍLIP, BAL, ROS¹, LR:385) In the pre-classical Tengwar system presupposed in the Etymologies, the name Silpion is also applied to tengwa #29, which letter Tolkien would later call silmë instead.

silquelosseën ("q") noun "blossom-white hair" (MC:216; this is "Qenya", but compare lossë)

silumë adv. “at this time” (VT49:11, 18). Compare talumë, #sillumë.

síma noun “mind, imagination” (VT49:16); variant isima. Also attested with endings: símaryassen “in their imaginations” (with the ending -rya used = “their” rather than “his/her”, according to colloquial useage) (VT49:16)