Proto-CChadic: *c/sar-
Meaning: 'remember' 1 , 'look, search' 2
Mofu-Gudur: -sǝr- 1 [BMof]
Masa: sàr 2 [CC] regarder, chercher
Mesme: sar 1 [Kr N 390]
Notes: in Mofu also 'to know", most probably due to contamination with *sVn- 'to know' (-r < *-n is possible)