1.
If someone is ~ to do something, they often or regularly do it. (WRITTEN)
Both have committed their indiscretions, as human beings are ~ to do.
= inclined
ADJ: v-link ADJ to-inf
2.
If someone does a particular thing as is their ~, they do that thing often or regularly. (WRITTEN)
Paul woke early, as was his ~.
PHRASE: V inflects