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The water is deceptive. It's much deeper than it looks.

de • ci • bel / ' dessbel / noun

[ count ]

a measurement of how loud a sound is

de .cide © / dismd/ verb

( de • cides , de cid • ing , de • cid ed )

to choose something after thinking about the possibilities I can't decide what color to paint my room. We've decided to go to Florida for our vacation. She decided that she didn't want to come.

dec • i • mal / ' dessml / noun

[count]

( math ) part of a number, written after the mark (.) Three quarters written as a decimal is 0.75. Style

We say "0.75" as "zero point seven five."

dec • i • mal point / ^essml ' point / noun

[count]

( math ) a small round mark, used to separate a whole number from a decimal

To multiply 1.55 by 10, move the decimal point one place to the right.

de .ci .sion © /disi₃n/ noun

[ count ]

choosing something after thinking; deciding I have to make a decision about what I'm going to do when I finish school.

de • ci • sive / di ' saisiv / adjective

able to make decisions quickly It's no good hesitating. Be decisive.

—ANTONYM indecisive

making something certain or final the decisive battle of the war

deck / dek / noun

[count ]

one of the floors of a ship, airplane, or bus

He stood on the lower deck of the ship and looked out to sea.

a set of 52 cards for playing games

— Look at the picture at playing card .

a wooden floor that is built outside the back of a house, where you can sit and relax

Let's go sit out on the deck.

de • clare / di kler / verb ( de clares , de • clar • ing , de • clared )

to say very clearly what you think or what you will do, often to a lot of people

He declared that he was not a thief. The country declared war on its enemy.

to give information about goods or money so that you can pay tax on them or it

You must declare all your income on this form.

dec • la • ra • tion / |dekls ' reijn / noun

[ count, noncount ]

a declaration of support

the Declaration of Independence

de • clineaw / di ' klain /

( de clines , de • clin • ing , de • clined )

to become weaker, smaller, or worse The standard of education has declined.

de • clinenoun [ count, noncount ] a decline in sales

de • com • pose / |diksm' pouz / verb ( de • com • pos • es , de • com • pos • ing , de • com • posed )

to be slowly destroyed by natural chemical processes a decomposing corpse

de • com • po • si • tion / |dikamps ' zijn / noun

[ noncount ]

dec .0 . rate Ф/ 'defereit/ verb

( dec • o • rates , dec • o • rat ing , dec • o • rat ed )

to make something look more attractive by adding things to it

We decorated the room with flowers. to decorate a Christmas tree

dec • o • ra • tion / |deks ' reijn / noun

[ count, noncount ]

something that you add to a thing to make it look more attractive

Christmas decorations

dec • o • ra • tive / ' deksrstiv / adjective

added to make something look attractive a tablecloth with a decorative lace edge

de • crease / di kris / verb

( de creas • es , de creas • ing , de • creased )

to become or to make something smaller or less

The number of employees has decreased from 200 to 100.

—ANTONYM increase

►de • crease / dikris / noun [ count, noncount ]