十年唔耕，九年唔種 (sap6 nin4 m4 gaang1 ，gau2 nin4 m4 zung3) — loss of skills if not used for a long time in Cantonese
sapˍ₆十ninˎ₄年mˎ₄唔gaangˉ¹耕，，gau2九ninˎ₄年mˎ₄唔zung˗₃種简 十年唔耕，九年唔种
Mandarin Pinyin: shi2 nian2 n2 geng1 , jiu3 nian2 m2 zhong3
Meaning of 十年唔耕，九年唔種
nounloss of skills if not used for a long time
proverbA proverb meaning that if one neglects their work for a long time, it will be very difficult to recover.