Mi lasis la hundon en la domon = I let the dog into the house.
To let remain, as:--Li lasis la libron sur la tablo = He left the book on the table.
Mi lasisla hundon en la domo = I left the dog in the house.
To lose restraint upon something, as:--Li lasis fali la libron = He let the book fall.
To leave in a certain state, as:--Li lasis min en la plej granda embaraso = He left me in the greatest embarrassment.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "lasis" in a variety of sentences. We hope that you will now be able to make sentences using this word.