The word interrumpieras is the imperfect subjunctive form of interrumpir in the second person singular. There are other translations for this conjugation.
See the full interrumpir conjugation
Te dije que no me interrumpieras mientras meditaba.
I told you not to bother me when I meditate.
Quizás interrumpieras algo privado...
Maybe you interrupted something private...
Desearía que no me interrumpieras.
I wish you wouldn't interrupt.
-Hubiera deseado que no me interrumpieras.
I wish you hadn't interrupted me.
Dije que no interrumpieras.
I said, don't interrupt.
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