godan verb (-su)
get really into; become absorbed in
Describes starting to become deeply engrossed in a hobby, interest, or activity. Often used when someone develops a new passion.
最近、彼は写真に凝り出した。
Lately, he's gotten really into photography.
母が急にヨガに凝りだして、毎朝
My mother suddenly got into yoga and practices every morning.