assentatrix
From LSJ
ᾗ μήτε χλαῖνα μήτε σισύρα συμφέρει → content neither with cloak nor rug, be never satisfied, can't get no satisfaction, be hard to please
Latin > English (Lewis & Short)
assentātrix: (ads-), īcis, f. assentator,
I a female flatterer: adsentatrix scelestast, Plaut. Most. 1, 3, 100.
Latin > German (Georges)
assentātrīx (adsentātrīx), trīcis, f. (assentator), die unablässige Beipflichterin, Liebedienerin (Ggstz. adversatrix), Plaut. most. 257: lingua ass., Aldh. de laud. virg. 58.
Latin > English
assentatrix assentatricis N F :: woman who flatters