When prefix se- is combined with a noun it would mean ‘one of that noun’. In the example below, ‘gelas’ means glass. Therefore, segelas means one glass. In English, se + noun usually translates into a / an.
Examples
| Root Word | Se + Root Word | In A Sentence | Meaning |
| gelas | segelas | Dia memberi saya segelas air | He gives me one glass of water |
| mobil | semobil | Saya pergi ke sekolah semobil dengan teman saya | I go to school with my friend in one car |
| orang | seorang | Yang lulus ujian cuma seorang | Only one person passed the exam |
| kota | sekota | Di Indonesia kami dulu tinggal sekota | In Indonesia we used to live in the same city |
If it occurs with group numbers prefix se- is to form cardinal numbers and fractions.
Examples
| Se + Root Word | Meaning | Se + Root Word | Meaning |
| sejuta | one million | sepuluh | ten |
| seribu | one thousand | sebelas | eleven |
| setengah | half | sepertiga | one third |
| seperdelapan | one eight | seperempat | a quarter |
It also replaces the number “satu” or one before classifiers. When a measure word is being used in conjunction with only one object, the numeral prefix se- is used in front of the measure word, not satu.
Examples
| Root Word | Se + Root Word | Meaning |
| batang | sebatang lilin | a candle stick |
| buah | sebuah apel | an apple |
| cangkir | secangkir teh | a cup of tea |
| ekor | seekor kambing | a goat |
| gelas | segelas air | a glass of water |
| helai | sehelai rambut | one piece of hair |
| ikat | seikat bunga | a bunch of flowers |
| kejap | sekejap mata | in a blink of an eye |
| lembar | selembar kertas | one piece of paper |
| mangkuk | semangkuk sup | a bowl of soup |
| orang | seorang wanita | a woman |
| pasang | sepasang sepatu | a pair of shoes |
| piring | sepiring makanan | a plate of food |
| potong | sepotong kue | a slice of cake |
| sendok | sesendok makan | one table spoon |
| siung | sesiung bawang putih | a clove of garlic |
| suap | sesuap nasi | a mouthful of rice |
| tangkai | setangkai bunga | a flower |
| titik | setitik darah | a drop of blood |
If you combine prefix se- with adjective it would mean ‘as good as that adjective’. In the example below, cantik means beautiful. Therefore, secantik means as beautiful as.
Examples
| Root Word | Se + Root Word | In A Sentence | Meaning |
| cantik | secantik | Dia secantik ibunya | She is as pretty as her mother |
| kuat | sekuat | Dia tidak sekuat dulu | He is not as strong as he used to be |
| kecil | sekecil | Dia tidak pernah tinggal di rumah sekecil ini | He never lives in a house as small as this |