Appreciate means to value something. It also means to be thankful of what you have.

ap·pre·ci·a·tion   uh-pree-shee-ey-shuhn

noun
1.
gratitude; thankful recognition: They showed their appreciation by giving him a gold watch.
2.
the act of estimating the qualities of things and giving them their proper value.
3.
clear perception or recognition, especially of aesthetic quality: a course in art appreciation.
4.
an increase or rise in the value of property, goods, etc.
5.
critical notice; evaluation; opinion, as of a situation, person, etc.

an overwhelming feeling of gratitude - for example when someone uber generously gives you some music off their ipod.. and a fair bit resultant love goes into that word too.

It's like thank you, but on steroids

1.AppreciateVN(not used in the progressive tenses)to recognize the good qualities of sb/sth

2.(not usually used in the progressive tenses)to be grateful for sth that sb has done;to welcome sth

3.(not used in the progressive tenses)to understand that sth is true

When your girlfriend gives you a blowjob she is showing appreciation.

a term of polite rejection used by prospective employers, girlfriends and perhaps other people whose approval you seek. It generally means "I really don't give a crap, but objectively speaking, I suppose it's possible that someone else might."

Your child's thanks for not only bringing them up and giving them everything they will ever need. doing their homework throughout their educational periods, for solving their ongoing everyday problems on an ongoing basis, taking their constant abuse and criticism once they leave home as they now know everything about life and then letting them move back in, each time they constantly fail in their miserable lives in the real world and then it starts all over again and even then they won't do any chores around the house, like taking out the garbage to the garage, never mind the curb or even stepping into the garage to throw their recycles into the right bin, washing their own clothes, making their own meals and the list goes on from there but I am sure they will be there and on time when the lawyer reads out wills and be wearing brand new clothes that we weren't available to buy them fortunately!

A pejoritive for the phrase "go down on him/her" ... In replace of "to give oral pleasure to"