дуюм

Ман дар синфи дуюм мехонам.
I am in second grade.
Хурӯс бори дуюм бонг зад.
The rooster crowed a second time.

Bonus:
Sometimes this word is written дувум.
To form ordinal numbers (first, second, third…) add the suffix -ум to the number. If the number ends in a vowel, the suffix is -юм.
як, якум: one, first
ду, дуюм: two, second
се, сеюм: three, third
чор, чорум: four, fourth
Ordinal numbers are often abbreviated when writing dates, as in “5-уми апрел” (the fifth of April).