In sociology, Gesellschaft refers to a society where individual relationships are formed based on contracts.

He suddenly vanished.

Estradiol is a type of female hormone, mainly produced in the ovaries.

He discreetly swapped my wallet.

Liquid nitrogen is very cold, so care must be taken when handling it.

My new light vehicle is fuel-efficient and very convenient.

Projective geometry is a branch of mathematics that studies geometric objects such as points, lines, and planes and their relationships.

He is good at playing the contrabass.

He drew the ace of spades.

The reporter is investigating the details of the incident.