Concept:
An antonym is a word opposite in meaning.
The word
\[
\text{Dismantle}
\]
means to take something apart or separate it into pieces.
Step 1: Understand dismantle.
For example, dismantling a machine means taking its parts apart.
So,
\[
\text{Dismantle}=\text{take apart}
\]
Step 2: Find the opposite.
The opposite of taking apart is building or making.
\[
\text{Construct}=\text{build}
\]
So construct is the antonym of dismantle.
Step 3: Check other options.
\[
\text{Remove}
\]
means take away.
\[
\text{Irritate}
\]
means annoy.
\[
\text{Disintegrate}
\]
means break into parts, which is similar to dismantle, not opposite.
Step 4: Final answer.
\[
\boxed{\text{construct}}
\]