The suffix "-yne" in a hydrocarbon name indicates the presence of a triple bond between two carbon atoms.

Here's a breakdown:

* Hydrocarbon: A molecule consisting only of hydrogen and carbon atoms.

* Suffix: The ending of a word, which often denotes a specific chemical feature.

* -yne: Indicates a triple bond between two carbon atoms.

For example:

* Ethane (C₂H₆): A single bond between the two carbon atoms.

* Ethene (C₂H₄): A double bond between the two carbon atoms.

* Ethyne (C₂H₂): A triple bond between the two carbon atoms.