Hello nadeem hayat, I'm not a teacher. I hope my advice can still help!
I got these definitions from dictionary.com . It's a very useful site!
undercutting
–verb (used with object)
1.to cut under or beneath.
2.to cut away material from so as to leave a portion overhanging, as in carving or sculpture.
3.to offer goods or services at a lower price or rate than (a competing price or rate) or than that of (a competitor).
4.to weaken or destroy the impact or effectiveness of; undermine.
5.Golf. to hit (the ball) so as to cause a backspin.
6.Tennis. to slice (the ball) using an underhand motion.
7.to cut (a sound recording) with grooves too shallow or with insufficient lateral motion of the stylus.
8.Forestry. to cut a notch in (a tree) in order to control the direction in which the tree is to fall.
–verb (used without object)
9.to undercut material, a competitor, a ball, etc.
–noun
10.a cut or a cutting away underneath.
11.a notch cut in a tree to determine the direction in which the tree is to fall and to prevent splitting.
12.Golf. a backspin.
13.Tennis. a slice or cut made with an underhand motion.
14.Chiefly British. a tenderloin of beef including the fillet.
15.Dentistry. a tooth cavity prepared with a wide base for anchoring a filling securely.
–adjective
16.having or resulting from an undercut.
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conspicuous
–adjective
1.easily seen or noticed; readily visible or observable: a conspicuous error.
2.attracting special attention, as by outstanding qualities or eccentricities: He was conspicuous by his booming laughter.
* * *
self-contradiction
–noun
1.an act or instance of contradicting oneself or itself.
2.a statement containing contradictory elements.