Dear Teachers,<br/><br/>1. "ass", "buttock", "butt" and "behind". Are these the same meaning? and which one is the most common?<br/><br/>2. She doesn't deny her son anything.<br/><br/>- This means " she doesn't refuse to give her son anything", right?<br/><br/>3. As for trusting her again, it's a tough call. <br/><br/>- "tough call" here means "tough request", right?<br/><br/>4. Her significant other is very smart and gallant.<br/><br/>- "significant other" here means "lover", "boyfriend" or "girlfriend", right?<br/><br/>Thanks very much to Teachers,<br/><br/> Stevenukd.