Question

Opposite words -
valuable
Imaginary
entire
thrilling
decided
unfortunately
heavy

Answer 1

Oposite words [ antonyms ]

$\sf{\purple{Valuable \rightarrow}}$  

$\sf{\green{Ch eap \; , \; use less \; , \; cra ppy \; , \; wort hless \;, \; in significant }}$

$\sf{\purple{Imaginary \rightarrow}}$

 $\sf{\green{Real \; , \; proven \; , \; actual \;,\; factual }}$

$\sf{\purple{Entire \rightarrow}}$

 $\sf{\green{Partial \;,\; broken}}$

$\sf{\purple{Thrilling \rightarrow}}$  

$\sf{\green{Boring \;,\; d ull\;,\; t edious}}$

$\sf{\purple{Decided \rightarrow}}$  

$\sf{\green{Uncertain \;,\; undetermined \;,\; doubtful}}$

$\sf{\purple{Unfortunately \rightarrow}}$  

$\sf{\green{Fortunately \;,\; luckily }}$

$\sf{\purple{Heavy \rightarrow}}$

$\sf{\green{Slim\;,\; m ild \;,\; light \; ,\;compact}}$

____________________

Antonyms - The word which is opposite to the given word is called antonym .

Like - good - bad , high - low etc

Answer 2

$\bf{\underline{\underline{Antonyms}}}$

A word opposite in meaning to others in known as antonyms.

(e.g. Bad - Good )

$\bf{\underline{\underline{Answers}}}$

$\bf{\blue{valuable\rightarrow \:valueless}}$

$\bf{\blue{Imaginary\rightarrow\:Real}}$

$\bf{\blue{Entire\rightarrow\:Partial}}$

$\bf{\blue{Thrilling\rightarrow\:Bore}}$

$\bf{\blue{Decided\rightarrow\:Possible}}$

$\bf{\blue{Unfortunately\rightarrow\:Luckily}}$

$\bf{\blue{Heavy\rightarrow\:Light}}$

$\bf{\underline{\underline{Thanks}}}$