可惊

• 口(mouth; opening)RADICAL
• 丁(man; adult male)PHONETIC

A mouth uttering words of approval with a sound like "ding" gives you the character meaning "can" or "able."

• 忄(heart; emotion)RADICAL
• 京(capital; grand)PHONO-SEMANTIC

The heart suddenly trembles violently like a bustling capital in turmoil—that is fear and alarm.