Where does “plaintful” come from?

plaintful (English) comes from English plaint, from Middle English plainte, from Old French pleinte, from Latin plancta, from Latin planctus, from Latin -tus, from Proto-Italic -tus, from Proto-Indo-European -tus — Derives action nouns from verb roots.

plaintful (English): complaining; expressing sorrow audibly

Definitions

  1. complaining; expressing sorrow audibly

Ancestry of “plaintful”, step by step

plaintful traces back through two separate lines of ancestry.

via English plaint

StepLanguageWordMeaning
1EnglishplaintA lament or woeful cry; A complaint; A sad song
2Middle Englishplainte
3Old Frenchpleintelament; complaint
4Latinplanctanominative feminine singular of plānctus;...
5Latinplanctusstruck, beaten; bewailed, lamented, mourned;...
6Latin-tusForms the past participle of verbs; Forms...
7Proto-Italic-tus
8Proto-Indo-European-tusDerives action nouns from verb roots

via English ful

StepLanguageWordMeaning
1Englishful
Every word from Proto-Indo-European -tus