Quenya 

ala

not

ala, #ála (1) imperative particle á, a combined with the negation , -la "not" to express a prohibition (VT43:22; see #1). Also with 1st person suffix -lyë (alalyë and álalyë, VT43:10, 22, VT44:8) and 1st person pl. object suffix - (alamë and álamë, "do not [do something to] us", as in ála tulya, "do not lead us", VT43:12, 22). In the essay Quendi and Eldar, negative imperatives are rather indicated by áva, q.v., but this form can well coexist with ala, #ála.