ألا

Etymology 1
From.

Conjunction

 * 1) negate a verb if the following verb is in subjunctive
 * 2) lest, that [...] not, in order that [...] not, so as not to
 * 1) lest, that [...] not, in order that [...] not, so as not to

Etymology 2
From.

Particle

 * 1) do/does ... not, don't/doesn't

Particle

 * 1) verily, truly, indeed, oh yes!

Verb

 * 1) to neglect to do, to fail to do, not to do
 * 2) to desist, to refrain