Many old customs remain in this village.
It is his habit to take a walk every morning.
習わし is a slightly literary near-synonym of しきたり, both meaning an established custom, but しきたり more strongly implies it must be followed.
traditional saying; proverb; idiom
Standard kanji spelling; the most common written form.
Alternate kanji spelling; less common but still encountered.
Derived from the verb 習う (ならう, 'to learn'), with the nominalizing suffix わし. Originally referred to something learned and passed down, hence 'custom' or 'habit'.