Part of speech: Adjective (satellite)
capable of existing or taking place or proving true
Example: possible to do
Accomplishable, Realizable, Manageable, Achievable, Doable
The word "doable" comes from Middle English doable.
do – A related word in the same word family.
able – A related word in the same word family.
Chaucer's Canterbury Tales show how creatively Middle English speakers mixed vocabularies.