Answer: OBSESS

AnswerCrossword Clue
OBSESSLose sleep (over)
OBSESSPreoccupy excessively
OBSESSHave fixations
OBSESSPrey on one's mind
OBSESSThink about too much
OBSESSBe unable to let go
OBSESSHave a fixation (on)
OBSESSReally dwell (on)
OBSESSReally dwell on, with 'over'
OBSESSTo be excessively preoccupied
OBSESSWorry compulsively
OBSESSPreoccupy and then some
OBSESSBecome fixated
OBSESSBecome completely absorbed
OBSESSHave a fixation
OBSESSKeep thinking about, with "on"
OBSESSDwell
OBSESSTake hold of, in a way
OBSESSMonopolize one's mind
obsessto dominate the thoughts of
obsessto preoccupy the thoughts of constantly
obsessto think about something constantly
OBSESSConstantly worry
OBSESSThink about only one thing
OBSESSHyperfocus
OBSESSFocus single-mindedly on something
OBSESSTake control of
OBSESSCan't stop thinking about something
OBSESSDwell persistently
OBSESSGo off the deep end
OBSESSBe excessively preoccupied
OBSESSPersistently think about something
OBSESSBe preoccupied with
OBSESSBeyond preoccupy
OBSESSDwell on
OBSESSMore than just worry
OBSESSPreoccupy to an extreme
OBSESSPreoccupy completely
OBSESSWorry persistently
OBSESSHave a one-track mind