ichidan verb, transitive verb
dry until stiff; dry and harden
Used when drying something until it becomes stiff or hard, such as food, clay, or glue.
粘土を天日で干し固める。
Dry the clay in the sun until it hardens.
干し固めた魚は保存がきく。
Fish that has been dried until stiff keeps well.
Compound of 干し (hoshi, 'drying', continuative form of 干す) + 固める (katameru, 'to harden').