英语词汇fastness的发音释义、词根词缀、结构分析、同源词、词频及词根记忆法-英语词根词缀词典

词汇	fastness
词根词缀	词源： "a place not easily forced, a stronghold," late O.E., from fast (adj.) in its older sense of "firm, fixed in place" + -ness.
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