His presentation was so jargonish that I couldn't understand a word he said.

He is jargonising the technical terms to make them easier to understand.

He often jargonises his presentations, making it difficult for the audience to understand.

He jargonised the presentation, making it difficult for the audience to understand.

The jargonel is a type of pear that was popular in the 18th century.

The jargonels in the market were selling like hotcakes.

The jargonisations used in the tech industry can be difficult to understand.

He used so much jargonese that I couldn't understand a word he was saying.