intricate

Very complicated or detailed; having many interconnecting parts or elements.

• intricacy/ˈɪntrɪkəsi/(n)复杂性
• intricately(adv)精细地

• intricate design
• intricate details
• intricate pattern
• intricate process
• intricate system

1. 1.The watchmaker assembled the intricate mechanism by hand, each tiny gear fitting precisely into place. (complex, detailed)
2. 2.Understanding the intricacies of international tax law requires years of specialised study. (complexities)

• complex/ˈkɒmplɛks/— consisting of many parts — more neutral
• elaborate/ɪˈlæbərət/— detailed and carefully prepared
• sophisticated/səˈfɪstɪkeɪtɪd/— complex and refined

from Latin "intricatus" (entangled) — "intricare" (to entangle) — in- (in) + tricae (perplexities, tricks)