Inflected form: simple past tense and past participle of the verb "sharpen".
Past participial adjective derived from the verb 'sharpen'.
The knife was sharpened and ready for use.
Нож был заточенный и готов к использованию.
The pencil had a sharpened tip.
Карандаш имел заостренный кончик.
‘sharpened’ is widely used attributively (e.g., “a sharpened pencil”) and functions as an adjective derived from the verb.