抖 can mean involuntary trembling (from cold, fear, nervousness) or deliberate shaking (to shake off dust). Also appears in 抖音 (Dǒuyīn, TikTok's Chinese name — literally 'shaking sound').
memory
The hand radical 扌 on the left + 斗 (dǒu, fight/struggle) on the right — a struggling hand that trembles.