He is thought to be a greedy person.

His greed for money led to his downfall.

He observed the bird's feathers using a speculum.

I like to soak in the bathtub after a long day.

He is always thought to be a greedy person.

He has a special ability.

"Once in a lifetime" means to cherish the encounter that happens only once in one's lifetime.

He missed a once-in-a-lifetime opportunity.

The story of the time of creation is mysterious and interesting.

What is the half-life of this substance?