antelope

羚 is composed of a variant of 羊 (sheep) and 令 (command). 令 originally means instructions or commands issued by a superior to a subordinate, extended to imply something that cannot be disobeyed. The forces of nature and the way of heaven are irresistible and cannot be defied, so 令 here can be understood as referring to natural essence or inherent nature. The inherent nature of sheep is to be gentle and docile yet swift and agile in running, therefore 羚 is used to represent animals that resemble sheep and possess these qualities of being gentle and excellent at running.