matronize

[ mey-truh-nahyz ]
/ ˈmeɪ trəˌnaɪz /

verb (used with object), ma·tron·ized, ma·tron·iz·ing.

to cause to become matronly; cause to act as, or fulfill the role of, matron.
to serve as a matron to; chaperon.

verb (used without object), ma·tron·ized, ma·tron·iz·ing.

to become a matron.
Also especially British, ma·tron·ise.

Origin of matronize

First recorded in 1745–55; matron + -ize