being physically relaxed and at ease
It helps if you have a comfortable chair to sit in at work.

in a manner that is greater, more significant, or important than usual
Babies lose heat much faster than adults, and are especially vulnerable to the cold in their first month.

to create something through thought and reason
Alexander Graham Bell invented the first telephone.

mostly; regarding the most important part of something
The birds live mainly on nectar.

belonging to current or recent time
modern music is different to the music in the past.

in part; not completely
That was partly my fault.

lever worked by the foot
Push the pedals with your feet to make the bicycle move forward.

the back of a thing or area
When driving, glance at the mirrors to check your rear.

an act or process of moving goods or people from one place to another
Public transport in Korea is very convenient.

standing straight up
Sitting in an upright position is better for your back than slouching.