Instill 是個動詞，意為「逐漸灌輸 (思想、信仰等)；逐漸培養 (感情等)」，大多以 instill something in/into someone 的型態出現，如 It is part of my job to instill confidence in/into my students. (我的部分職責是逐漸培養學生的信心)；We must instill respect for the law in the younger generation. (我們必須將尊重法律的觀念逐漸灌輸給年輕一代)；Amy’s parents had instilled a love of music in her. (艾美的父母逐漸培養了她對音樂的熱愛)。此外，instill 還意為「徐徐滴入」，如 Extra care is necessary when instilling eye drops into babies and children. (在給嬰兒和小孩點眼藥水時要格外小心)。
Instill 為美式英語拼法，英式英語是拼成 instil。它們的時態變化分別為 instill instilled instilled instilling instills 以及 instil instilled instilled instilling instils，而名詞為 instillation。
Install 也是動詞，意為「安裝 (軟硬體、設備等)」、「正式任命；使 (某人) 正式擔任」及「安置：安頓」，如 It’s important to install antivirus software. (安裝防毒軟體是很重要的)；They have installed three security cameras in their office. (他們已在辦公室安裝三具監視器)；She was installed as the first female CEO of the company. (她獲任命擔任該公司首位女執行長)；Jerry is comfortably installed before the TV/installed in his new office. (傑瑞舒舒服服地坐在電視機前/坐在他的新辦公室裡)。
Install 為美式英語拼法，英式英語是拼成 instal。它們的時態變化分別為 install installed installed installing installs 以及 instal installed installed installing instals，而名詞為 installation。