To disguise, to change something's appearance, so that it can't be recognized.伪装，假装

He wasn't good at disguising himself so we knew who he was right away.

She wore a disguise so I wasn't sure who she was.

(She didn't want anyone to recognize her, so she wore a disguise.)

To clarify, to explain or make something clear.使清楚，澄清;

We were sure what he meant until he clarified his ideas.

Everyone was confused until she clarified what she meant.

(There are still many details that need to be clarified.)

To confuse, to make things difficult to understand, the opposite of to clarify.

Everyone was confused because her presentation was so disorganized.陈述，报告;

He confuses people because he keeps changing his ideas.

The instructions were confusing so nobody knew what to do.

(Her comments during the meeting weren't very constructive because they were so confusing.)意见，评论                                                                       建设性的; 积极的

To ignore, to try not to notice or deal with something, to act as if something isn't there.

We tried to ignore her, but she finally stood up and told everyone to shut up.

People don't respect or like her, so they ignore her in the office.

(We can no longer ignore the fact that our company needs to be reorganized.)

To confirm, to indicate that something is correct, or completed as expected.

We weren't sure if he was going to accept our offer until he called and confirmed it.

We can't start the project without written confirmation that we agree on the details.

(He denied that he was at the meeting, but we have confirmed that he was there.)拒绝承认

(I don't trust him because he is so good at disguising his real plans.)