(historical) to arrange an engagement, whereby both sets of parents promise that their children shall wed; generally arranged while the children are still young

permission from both sets of parents to marry / (rare) someone so permitted: a fiancée (female) or fiancé (male)

to permit one's child to marry

(Buddhism) think on the power of Kannon

(honorific) (both) parents

(literally) know the other side and yourself, a hundred battles will not be perilous