This word is an adjective which describes something (especially plan) is very complex and well designed in every single details

intricate?

回復 @啊啊是誰都對：Good guess, but unfortunately wrong. And the description in dictionary is 【Planned or executed with painstaking attention to numerous parts or details】

回復 @淺風仁櫻：elaborate?

回復 @啊啊是誰都對：You are right! Congratulations!

回復 @淺風仁櫻：Thanks. And that's because the second hints are too obvious 

回復 @啊啊是誰都對：Ups, that's because I don't know how to describe it more accurately