sincere, fear, sudden, blinking
恂 centers on a state of inner sincerity or earnestness, often with an edge of nervousness or sudden awareness. The meanings 'fear', 'sudden', and 'blinking' all describe moments when sincere feeling breaks through composure.
恂 combines 忄 (heart/mind) with 旬, which likely contributes the sound. The exact historical development of the meaning is uncertain, but the heart radical points to an emotional or mental state.
The heart radical 忄 beside 旬 (a ten-day period) suggests a heart that is sincere and true over time, but also prone to sudden flutters—like blinking in surprise or fear when sincerity is tested.
For ジュン, imagine a sincere person named June who always speaks from the heart: June -> ジュン, and her earnestness sometimes makes her blink nervously.