Sentences about 20 words I want to learn

Word                              Used in?                                  Sentence
1-Mandate    in a song (mandate of the heaven)  The Judge will mandate probation for the thief 
2-Mannerly        the name of a band           You are the only mannerly person I know
3-Opt                    in a song (opt-out)          We opted to go to the cinema tonight, we want to                                                                              see the new film
4-Sealant             in plomering                     I needed sealant to prevent this accident with the                                                                            pipe but we didn't have any sealant in the house.
5-Abrogate        the politics use it               The President decided to abrogate an important                                                                                law in the constitution.
6-Belie                Lawyer use it                     The judge belied the proves of the lawyer and the                                                                            lawyer remained like a completely fool
7-Chicanery  in a book (chicano,chicanery)Hey policemans! He's the chicanery that tried to                                                                                swindle me
8-Churlish        in a song                               You aren't affable you are a churlish man
9-Circumlocution                                          Please stop with your circumlocution and explain                                                                              me clearly what happened
10-Diffident                                                   This girl is too diffident, why you don't tell her I he                                                                           want to dance with you?
11-Enervate                                                  Don't be enervate is only a work interviwe
12-Feckless                                                   Please for once in your life you can't be feckless and                                                                         assume your resposibilities
13-Gauche                                                     You are a gauche in enginering, why you didn't                                                                                 tried to be a doctor?
14-Hubris                                                      The hubris is the biggest problem in the society
15-Hypotenuse      in mathematics            Guys please calculate the hypotenuse of this triangle                                                           with the Pitagoras theoreme
16-Incognito         a TV programme           He is like an incognito no one know his identity 
17-Inculate                                                    Please, could you inculcate your soon how to be                                                                                 educated?
18-Loquacious                                              Stop talking! you lool like a loquacious
19-Notarize                                                   We need to go to a notarie, he need to notarize this                                                                           document
20-Omnipotent                                            Hittler thought he was omnipotent but finally he                                                                               lost the war