Where does “practisable” come from?

practisable (English) comes from English practise, from Middle English practizen, from Middle French pratiser, from French pratiquer, from French pratique, from Middle French practique, from Latin prāctica, from Ancient Greek πρακτική — passed , crossed.

Ancestry of “practisable”, step by step

practisable traces back through two separate lines of ancestry.

via English practise

StepLanguageWordMeaning
1EnglishpractiseTo repeat as a way of improving one's skill in...
2Middle Englishpractizen
3Middle Frenchpratiser
4Frenchpratiquerto do; to practise
5Frenchpratiqueapplied; concerning action or intervention of...
6Middle Frenchpractiquepractice act of doing; of practising
7Latinprāctica
8Ancient Greekπρακτικήpractice, experience
9Ancient GreekπρακτικόςOf, pertaining to, or appropriate for action; Fit...
10Ancient GreekπράσσωI do, practice
11Proto-Hellenicprā́ťťō
12Proto-Indo-Europeanpr̥h₂-k-yé-ti
13Proto-Indo-Europeanper-before, in front; first; to go through
14Proto-Indo-Europeanpr̥tóspassed , crossed

via English able

StepLanguageWordMeaning
1EnglishableEasy to use; Suitable; competent; Liable to
2Middle Englishablecapable, expert, qualified, skilful, competent
3Old Frenchableable; capable
4Latinhabilisable to have/possess/maintain; having sufficient...
5Latin-ilis-ile
6Proto-Italic-elis
7Proto-Indo-European-elis
8Proto-Indo-European-lósForms agent nouns from verbal roots
Every word from Proto-Indo-European pr̥tós