词根词缀co 共同 + in 使… + cid 落下;降临 + e → 使一同降临 → 巧合 → coincides 
词根记忆co(=com,共同,一起)+ inc… *  → coincides 
对比记忆inside n. 内部,内侧;adj… *  → coincides 
联想记忆coin硬币+cide (近似sid… *  → coincides 
联想记忆coin硬币+cide (近似sid… *  → coincides 
词根记忆co强调+in使+cid落下+e →… *  → coincides 
对比记忆algicide n.灭藻剂,杀藻剂… *  → coincides