The Hebrew root aman means firm, something that is supported or secure.
This word is used in Isaiah 22:23 for a nail that is fastened to a
"secure" place. Derived from this root is the word emun meaning a
craftsman. A craftsman is one who is firm and secure in his talent. Also
derived from aman is the word emunah meaning firmness, something or
someone that is firm in their actions.
When the Hebrew word emunah is translated as faith misconceptions of its
meaning occur. Faith is usually perceived as a knowing while the Hebrew
emunah is a firm action. To have faith in God is not knowing that God
exists or knowing that he will act, rather it is that the one with
emunah will act with firmness toward God's will
http://www.ancient-hebrew.org/27_faith.html
tl;dr: пожалуйста, не перекладывайте с больной головы на здоровую