60 ! объясните слова или напишите синонимы (на , разумеется) слова: brainchild, argument, search engine, commitment, user-friendly, complicated, frustrating, popularity, calculate, a fair amount, criticism, investor, catchy, inspired, neat, performance, headquarters, respond, fade объясните сколько сможете, .

Brainchild - design
Argument - reason
Search engine - hz, prosti(
Commitment - obligation
User - friendly - simple in using
Compilcated - tricky
Frustrating - dissapointing
Popularity - when smth or smn is famous
Calculate - accounting
A fair amount - enough of something for someone
Investor - depositor
Catchy - tricky
Inspired - to have a desire for doing smth great
Neat - clean
Performance - show
Respond - to be responsible
Fade - disappear