to look at sth steadily for a long time, usually while thinking about sth else

to need sth

to move slowly in the air or on the water

a difficult task that tests sb's courage or ability

a large area belonging to a country or a group of people

an organised challenge that is physically difficult

extremely low temperature

physical suffering inflicted as punishment

the most exciting thing

a condition that must be met in order for sth else to happen

the whole of sth

determination, self-control

to rapidly increase to high levels

to rapidly decrease to low levels

a limited amount, especially food or water

a very difficult event or situation

to do more than I believe I am capable of

changeable

a period of fighting against sth

a lump on the skin filled with liquid

not having the basic things needed for a comfortable life

to increase knowledge about sth

to anticipate

a walk across a difficult terrain fora long way

psychologically stable

demanding

difficult

to vary from sth to sth

that you need to have and do again and again, and which is difficult to give up