A soul denotes the combination of the live substance and the spirit. Allah (swt) says:
﴾اللَّهُ يَتَوَفَّى الْأَنفُسَ حِينَ مَوْتِهَا ﴿
(Allah takes the souls at the time of their death,) (Az-Zumar: 42)
Taking the soul means separating the spirit from the body. After that, on the Resurrection Day, the spirits will be returned to their bodies again.
زُوِّجَتْ (are paired): Each same kind will be gathered.