Quenya 

sillë

adverb. like this, like this, *in this way

A word for “like this”, a combination of si “this” and the suffix -llë related to “way, method, manner” (PE17/74), so perhaps more literally “✱in this way”.

Conceptual Development: Demonstrative, Relative, and Correlative Stems (DRC) from 1948 instead had ᴹQ. sil(de) “so, in this way, like this”, but using the earlier suffix -l(de) (PE23/111).