a journey or voyage undertaken by a group of people with a particular purpose, especially that of exploration, scientific research, or war:

the action or process of sailing or otherwise traveling all the way around something, especially the world:

a vehicle or craft that travels over land or water on a cushion of air provided by a downward blast:

make small adjustments to (something) in order to achieve the best or a desired performance:

(of a person) deal effectively with something difficult:

a human being subject to death, often contrasted with a divine being:

fail to resist pressure, temptation, or some other negative force:

long life:

the state or condition of being very fat or overweight:

a severe or excessive demand on the strength, resources, or abilities of someone or something: