October
词根词缀：
octagon n. 八角形
octa 八 + gon 角 → 八角形
October n. 十月（古罗马八月）
octogenarian n. 80~89岁的老人
octo 八 + gen 出生 + arian 表人 → 出生以后活了八十多年的人 → 80~89岁的老人
octolateral adj. 八边的
octo 八 + later 边 + al …的 → 八边的
octopus n. 章鱼
octo 八 + pus 足 → 八爪鱼 → 章鱼
数据来源：新东方英语词汇速记大全
相关例句：
The clinic opened for business last October and since then has treated more than 200 people.
该诊所去年10月开业，从那以后已经接诊200多人。
The meeting on 31 October is rearranged for 30 January.
10月31日的会议重新安排到了1月30日。
Most seasonal hiring is done in early October
大部分季节性招聘在10月初进行。
Families round here are at breaking point. They have been on half wages since October
这附近的家庭已经忍无可忍了。从10月以来他们就一直只领一半的薪水。
Between July 1st and October 1st, the central bank printed over 2 trillion roubles.
在7月1日至10月1日之间，中央银行印发了逾两万亿卢布。
She is to retire as from 1 October.
她将于10月1日退休。