However, suppose a person hates someone else ¹  and stalks him, attacks him, kills him, ²  and then flees to one of these cities.

Anyone who accidentally killed someone ¹  without hating him at the time of the accident ²  could flee to one of those cities and be safe.

Suppose he goes with someone else ¹  to the forest to cut wood and when he raises the ax ²  to cut the tree, the ax head flies loose ³  from the handle and strikes ⁴  his fellow worker ⁵  so hard that he dies. The person responsible ⁶  may then flee to one of these cities to save himself. ⁷ 

When a man is newly married, he need not go into ¹  the army nor be obligated in any way; he must be free to stay at home for a full year and bring joy to ²  the wife he has married.