#When they came

The word "they" refers to the participants in the burial procession.

#floor of Atad

Possible meanings are 1) the word "Atad" means "thorn" and it may refer to a place where large amounts of thorns grew, or 2) it may be the name of the person who owns the threshing floor. (See: [[:en:ta:vol1:translate:translate_names]])

#they mourned with very great and grievous sorrow

"they were extremely sad and they mourned very much"

#a seven day

"a 7 day" (See: [[:en:ta:vol2:translate:translate_numbers]])

#in the floor of Atad

"in the threshing floor of Atad" (See: [[:en:ta:vol1:translate:translate_names]])

#This is a very sad occasion for the Egyptians

"The mourning of the Egyptians is very great"

#Abel Mizraim

The translator can add a footnote that says: "The name Abel Mizraim means "the mourning of Egypt.'" (See: [[:en:ta:vol1:translate:translate_names]])