The word "catching sight of" refers to the act of seeing or noticing something or someone. Its antonyms are words that convey the opposite meaning, such as "losing sight of," "missing," "ignoring," "overlooking," and "avoiding." Losing sight of means to fail to notice or track something or someone. Missing refers to the act of not seeing or being aware of something, often due to a lack of attention or proximity. Ignoring means to intentionally not pay attention or acknowledge something or someone. Overlooking refers to the act of failing to notice something due to carelessness or neglect. Avoiding means to deliberately stay away from something or someone to prevent seeing or encountering them.