合成石油

• 亼(gather; converge; cover up)ASSOCIATIVE
• 口(mouth; box)RADICAL

A lid sealed tightly over a box's mouth combines into one whole.

• 丁(nail; peg; stud)PHONETIC
• 戈(weapon; spear)RADICAL

Hold the spear and halberd to fight to the end in order to achieve success.

• 氵(water; liquid)RADICAL
• 由(from; due to; oil (phonetic))PHONO-SEMANTIC

Oil is a liquid that flows from a natural source.