1570s, "accessible," from approach (v.) + -able. Figurative sense, "affable, friendly," is from 1610s. Related: Approachably; approachability.
the tales seem more approachable than his more difficult novels
a friendly approachable person
a site approachable from a branch of the Niger
apprentice
apprenticeship
apprise
apprize
approach
approachable
approbate
approbation
appropre
appropriate
appropriation