WHOLE CHARACTER
静jìng
still; motionless; quiet; without sound; calm; tranquil
静 is stillness and quiet: 安静 'quiet', 平静 'calm', 冷静 'keep cool'.
ZDIC detailed source: 形声,从靑、爭聲 — the blue-green side with 争 (zhēng) as the historical sound side. (The header row leaves formation empty; this account comes from the detailed section.)
MEANING: THE BLUE-GREEN SIDE
青qīng
blue; green (also other dictionary uses)
As an independent character 青 can mean blue or green. In a specific character its sound role is shown separately.
In 静: meaning: the blue-green side Shown with its documented or clearly limited role.
SOUND: 争 (ZHĒNG)
争zhēng
to contend; to strive
Standalone meaning is kept separate from its role in other characters.
In 静: sound: 争 (zhēng) A historical sound side: jìng has no modern sound match with zhēng — the initial, final and tone all differ.