мащерка

• ма́терка (máterka)
• ма́щерика (mášterika), ма́щерига (mášteriga), ма́щрика (máštrika) (with suffixes -ика (-ika)/-ига (-iga))

Per the Bulgarian Etymological Dictionary, derived from a putative stem *maťer- of Proto-Slavic *mati. Otherwise, a variant of Proto-Slavic *materъka - again a derivation from a case form of *mati. Ultimately from Proto-Indo-European *méh₂tēr.

• IPA^(key): [ˈmaʃtɛrkɐ]
• Hyphenation^(key): ма‧щер‧ка

ма́щерка • (mášterka) f

1. (uncountable) wild thyme (Thymus serpyllum)

   Synonyms: ди́ва ма́щерка (díva mášterka), ба́бина души́ца (bábina dušíca)

2. (countable, botany) thyme, any member of the genus Thymus

• ма́тер (máter, “mother”) (dated)
  • ма́йка (májka, “mother”) (diminutive, standard)
  • ма́тка (mátka, “matrix”)
  • ма́щеха (mášteha, “step-mother”)

• “мащерка”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
• “мащерка”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Chitanka, 2010
• Nayden Gerov (1899) “ма́щерка”, in Рѣчникъ на Блъгарскꙑй язꙑкъ. Съ тлъкувание рѣчи-тꙑ на Блъгарскꙑ и на Русскꙑ. [Dictionary of the Bulgarian language]‎ (in Bulgarian), volume 3, Plovdiv: Дружествена печꙗтница "Съгласие.", page 56
• Georgiev, Vladimir I., editor (1986), “мащерка”, in Български етимологичен речник [Bulgarian Etymological Dictionary] (in Bulgarian), volumes 3 (крес¹ – мѝнго¹), Sofia: Bulgarian Academy of Sciences Pubg. House, page 701