re·gress 
/ˈri:ˌgrɛs/ verb
re·gress·es; re·gressed; re·gress·ing /ˈri:ˌgrɛs/ verb [no obj] technical : to return to an earlier and usually worse or less developed condition or state
▪ The patient is regressing to a childlike state.
▪ The patient is regressing to a childlike state.
— re·gres·sion /rɪˈgrɛʃən/ noun, plural re·gres·sions [count, noncount]
/rɪˈgrɛʃən/ noun, plural re·gres·sions [count, noncount]
