Mairen fem. name(UT:210), initial element perhaps related or identical to mai "well". The second element is obscure; the root REN "recall, have in mind" (PM:372) could be related; if so the name may imply "well remembered", "(of) good memory" or something similar. It may also connect with the adj. maira, q.v. and compare the masc. name Mairon (PE18:163).
Quenya
al(a)-
prefix. well, happily
al(a)-
prefix. in-, un-, not; †-less, without
ala-
not
Mairen
well
ala
not
ala, #ála (1) imperative particle á, a combined with the negation lá, -la "not" to express a prohibition (VT43:22; see lá #1). Also with 1st person suffix -lyë (alalyë and álalyë, VT43:10, 22, VT44:8) and 1st person pl. object suffix -më (alamë and álamë, "do not [do something to] us", as in álamë 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.
ehtelu-
verb. well, bubble out
mai
well
mai (1) adv. "well" (VT47:6), apparently also used as prefix (PE17:17:162, 163, 172)
mai
adverb. well, well; [ᴱQ.] too much
mandë
well
mandë (2) adv. "well" (VT49:26; this is "Qenya"). Rather mai in Tolkiens later Quenya.
tampo
well
tampo noun "well" (QL:93)
tampo
noun. well
ala- (2) negative prefix "not", "un-", reduced to al- before a vowel (VT42:33, GALA, VT45:25), though the example Alcorin would suggest that al- can sometimes appear before a consonant as well. In a deleted entry in Etym, al(a)- was defined as "not" and said to be a "pure negative" (VT45:5). In alahasta, Alamanyar, alasaila, Alcorin.