اَلأعْدَادُ التَّرْتِيبِيَّةُ the Ordinal numbers from 2nd to 10th derive, more or less, from the corresponding cardinal numbers and follow the pattern فَاعِل . 1st is an exception, as it is an elative, i.e. a comparative and a superlative, e.g. أَوَّلُ instead of أَأْوَلُ masculine singular, أَوَّلُونَ sound masculine...