A new word: haste

haste, noun, /heɪst/

1 

great speed in doing something, especially because you do not have enough time SYN hurry.

I soon regretted my haste.

in your haste to do something

In his haste to leave, he forgot his briefcase.

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In everyday English, people usually say hurry rather than haste:

· In my hurry, I left my coat behind.

2 in haste

quickly or in a hurry.

They left in haste, without even saying goodbye.

3 make haste (old use)

to hurry or do something quickly.

4 more haste less speed (British English), or haste makes waste (American English)

used to say that it is better to do something slowly, because if you do it too quickly you will make mistakes.

hasty, adjective, /'heɪsti/

1 

done in a hurry, especially with bad results SYN  hurried. ► fast.

done or made very quickly.

He soon regretted his hasty decision.

a hasty breakfast.

I made a hasty sketch of the scene.

Seeing the dog, the cat made/beat a hasty retreat up a tree.

We don't want to make any hasty decisions.

a hasty marriage.

2 be hasty to do something

too soon, without careful enough thought. acting too quickly : ↑RASH.

Let’s not be hasty – sit down for a moment.

He later realized that he was too hasty in his decision to quit.

hastily, adverb, /ˈheɪstəli/

She hastily gathered her things and left.

a hastily made decision.

hastiness, noun,  /'heistinəs/

the hastiness [=haste] of his decision