Definition of "companionable"
companionable
adjective
comparative more companionable, superlative most companionable
Having the characteristics of a worthy companion; friendly and sociable.
Quotations
She returned presently, bringing a smoking basin and a basket of work; and, having placed the former on the hob, drew in her seat, evidently pleased to find me so companionable.
1847 December, Ellis Bell [pseudonym; Emily Brontë], Wuthering Heights, volumes (please specify |volume=I or II), London: Thomas Cautley Newby, […]
The up and down lines ran next to each other in vault-like tunnels, whereas the Tube trains would occupy their own tunnels. That's why the cut-and-cover lines are more human than the Tubes. They are more companionable. You can see people going the other way - your perspective is broadened.
2012, Andrew Martin, Underground Overground: A passenger's history of the Tube, Profile Books, pages 35–36