coreless：无果心的，无核心的，无芯的

词根词缀：core(= -cord-)心 + -less否定

• ophthalmic
• ophthalmo-
• ophthalmologist
• ophthalmology
• opiate
• opine
• opinion
• opinionated
• opinionist
• opium
• opossum
• opponent
• opportune
• opportunism
• opportunist
• opportunity
• oppose
• opposite
• opposition
• oppress
• oppression
• oppressive
• oppressor
• opprobrious
• opprobrium