Also means
to obsess
Usage Note
Assillare means to hound or torment someone with incessant demands or worries. It can be used both transitively (mi assilla con le sue domande — 'he pesters me with his questions') and reflexively (assillarsi) to mean to worry oneself obsessively. It conjugates regularly as a first-conjugation (-are) verb.
Examples
"I pensieri lo assillano di notte."
Natural Translation
Thoughts pester him at night.
Literal Translation
The thoughts him-pester at night.

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