cold的意思是寒冷的冷的未热过的已凉的冷却的冷漠的不友好的不易发现的感冒。例如：A cold spring will provide a natural check on the number of insects. coldness的意思是冷淡冷漠不友好的举止冷塞冷。例如：I felt there was a certain coldness in her manner.