The peril insured against may be any peril in respect of which the assured seeks and the insurers are willing to give protection. Certain perils are of every-day occurrence and are insured against in the ordinary course of business. Other perils can only be insured against with difficulty, if at all.
The perils insured against will, of course, vary in accordance with the class of insurance.
For the purpose of ascertaining what is the peril insured against, reference must be made to its description in the policy. It must, therefore, be described with accuracy and precision; for, although the words used to describe it are to be construed liberally, they are still restricted to their plan and ordinary meaning and do not extend to other perils which, though analogous in their operation, do not fairly fall within the scope of the words actually used. The peril which causes the loss must be the peril described in the policy, and no other. If, however, the peril causing the loss is the peril described in the policy, it is immaterial that it is also a peril which might have been insured against under a different species of policy.