a ‧ vun ‧ cu ‧ lar /əˈvʌŋkjələ, əˈvʌŋkjʊlə $ -ər/ BrE AmE adjective
[ Date: 1800-1900 ; Language: Latin ; Origin: avunculus ; ⇨ ↑ uncle ]
behaving in a kind and nice way to someone who is younger, rather like an uncle:
an avuncular pat on the shoulder