offensive
词根词缀：
defend v. 保卫
de 加强 + fend 打击 → 保卫
defense n. 保卫
de 加强 + fens 打击 + e → 保卫
defenseless adj. 无防备的
defense 保卫 + less 无…的 → 无防备的
fend v. 抵挡，击退
offend v. 得罪
of〔= ob 加强〕+ fend 打击 → 一再打击〔别人〕→ 得罪
offender n. 罪犯；冒犯者
offend 得罪 + er 表名词 → 罪犯；冒犯者
offensive adj. 冒犯的
of 加强 + fens 打击 + ive …的 → 冒犯的
数据来源：新东方英语词汇速记大全
相关例句：
The army is about to launch a major offensive.
陆军部队即将发动一次大规模进攻。
Even seemingly innocuous words are offensive in certain contexts.
甚至看似毫无恶意的言辞在某些语境下都会引起冒犯。
Heavy fighting has been going on after the guerrillas had launched their offensive
游击队发起攻击后，激烈的战斗一直持续不断。
I shall nail my colours firmly to the mast on this subject — as a feminist I find movies like this offensive.
我要非常明确地表明自己对这个主题的看法：作为一名女权主义者我认为这类电影是对女性的侮辱。
Consumers found the attitude of its staff offhand and generally offensive to the paying customer.
消费者认为其职员的态度漫不经心，对付款的顾客通常表现得令人反感。
The worst-ever defeat of this team proved once again that Stanford can be one of the most explosive offensive teams in the country.
该队前所未有的惨败再次证明斯坦福队是国内最具爆发力的进攻型队伍之一。