The first number you learn in Arabic. It looks like a 1 because the numbering system we use in English is derived from the Hindu–Arabic numeral system .
One وَاحِد wa-Hid
One ١ wa-Hid
The number 11
More to come, this one is tricky…
The numbers one and two have different rules applied to them when used as an adjective. The numbers 1 and 2 in Arabic follow the noun they modify, and agree with it in case and gender. Note the following examples .
Book كِتَاب kitab one واحدٌ wa-Hid
Letter رِسَالَة rei-sa-la one واحدةٌ wa-Hid