it means you dissapointed them
to let someone take advantage of you
I'm not quite sure what you mean here?
You let someone down by telling lies. One can let some down by disclosing confident information. Anything that betrays trust will lead to letting down.
your either considered a let down or depressed person, or it could be used as insult to say your a retard down syndrome=downy
only if you let them
oh. Let down in baking mean put the thing on the floor and step on it...
Let's misbehave.
walk away.
An optimist
Let's break it down. Incisive means "Sharp or sharp edge" as in cutting or tearing. Intellect- intelligence. What I have always know it to mean was someone that uses the intelligence that he was given for his gain. But only in a processes of tearing someone else down and apart. To be told you have "Incisive intellect" to me would be an insult.
If something is a let-down, it is a disappointment. The image here is that you have built up your hopes. You are looking forward to something, and when it does not occur, you feel as if you have been let down.
The phrase 'let down' can be defined in a number of ways. Let down means to disappoint or fail to fulfill the expectations but can also mean to to lower, deflate or untie.