to be on guard against; to stay alert to possible danger or a situation

vigilance; alertness; an awareness of possible errors or dangers and a readiness to prevent them

(idiom) diligent and alert from morning to night; cautious and hardworking all day long, never daring to slack off

to be worried and cautious from morning till night; to be constantly on one's guard

to be alarmed or afraid; palpitation or fear caused by a sudden fright

alarmed and fearful; filled with dread

to be alarmed or stay vigilant against potential danger

To exercise caution and remain vigilant; to keep oneself motivated and disciplined through a sense of alertness or fear.

(literary) to exercise caution and discipline; to be on guard; to constantly reflect on one's conduct to avoid mistakes

To pant or gasp because of extreme fear or anxiety; describes being terrified to the point of breathless trembling.

apprehensive; worried and fearful; often used to describe a heart or mind filled with anxiety

to be afraid; fearful of; apprehensive

to be on guard; to remain cautious and alert against potential danger or mistakes

to sharpen one's vigilance; to raise the level of alertness