3000 Kosakata Bahasa Inggris yang Sering Digunakan
3000 kosakata bahasa Inggris – O

| No. | Kosakata | Arti | Jenis Kata | Level |
| 1 | obey | mematuhi | v. | B2 |
| 2 | object | obyek | n. | A1 |
| 3 | objective | objektif | n., adj. | B2 |
| 4 | obligation | kewajiban | n. | B2 |
| 5 | observation | pengamatan | n. | B2 |
| 6 | observe | mengamati | v. | B2 |
| 7 | obtain | memperoleh | v. | B2 |
| 8 | obvious | jelas | adj. | B1 |
| 9 | obviously | jelas sekali | adv. | B1 |
| 10 | occasion | kesempatan | n. | B1 |
| 11 | occasionally | kadang-kadang | adv. | B2 |
| 12 | occur | terjadi | v. | B1 |
| 13 | ocean | laut | n. | A2 |
| 14 | o’clock | jam | adv. | A1 |
| 15 | October | Oktober | n. | A1 |
| 16 | odd | aneh | adj. | B1 |
| 17 | of | dari | prep. | A1 |
| 18 | off | mati | adv., prep. | A1 |
| 19 | offence | pelanggaran | n. | B2 |
| 20 | offend | menyinggung | v. | B2 |
| 21 | offensive | menyinggung | adj. | B2 |
| 22 | offer | menawarkan | v., n. | A2 |
| 23 | office | kantor | n. | A1 |
| 24 | officer | petugas | n. | A2 |
| 25 | official | resmi | adj. | B1 |
| 26 | often | sering | adv. | A1 |
| 27 | oh | oh | exclam. | A1 |
| 28 | oil | minyak | n. | A2 |
| 29 | OK | Oke | exclam., adj./adv. | A1 |
| 30 | old | tua | adj. | A1 |
| 31 | old-fashioned | kuno | adj. | B1 |
| 32 | on | pada | prep., adv. | A1 |
| 33 | once | sekali | adv. | A1 |
| 34 | one | satu | number/det., pron. | A1 |
| 35 | onion | Bawang | n. | A1 |
| 36 | online | on line | adj., adv. | A1 |
| 37 | only | hanya | adj., adv. | A1 |
| 38 | onto | ke | prep. | A2 |
| 39 | open | membuka | adj., v. | A1 |
| 40 | opening | pembukaan | n. | B2 |
| 41 | operate | beroperasi | v. | B2 |
| 42 | operation | operasi | n. | B1 |
| 43 | opinion | pendapat | n. | A1 |
| 44 | opponent | lawan | n. | B2 |
| 45 | opportunity | peluang | n. | A2 |
| 46 | oppose | menolak | v. | B2 |
| 47 | opposed | menentang | adj. | B2 |
| 48 | opposite | di depan | adj., adv., prep., n. | A1 |
| 49 | opposition | berlawanan | n. | B2 |
| 50 | option | pilihan | n. | A2 |
| 51 | or | atau | conj. | A1 |
| 52 | orange | jeruk | n., adj. | A1 |
| 53 | order | memesan | n., v. | A1 |
| 54 | ordinary | biasa | adj. | A2 |
| 55 | organ | organ | n. | B2 |
| 56 | organization | organisasi | n. | A2 |
| 57 | organize | mengatur | v. | A2 |
| 58 | organized | terorganisir | adj. | B1 |
| 59 | organizer | penyelenggara | n. | B1 |
| 60 | origin | asal | n. | B2 |
| 61 | original | asli | adj. | A2 |
| 62 | originally | semula | adv. | B1 |
| 63 | other | lainnya | adj./pron. | A1 |
| 64 | otherwise | jika tidak | adv. | B2 |
| 65 | ought | sebaiknya | modal, v. | B1 |
| 66 | our | kita | det. | A1 |
| 67 | ours | milik kita | pron. | B1 |
| 68 | ourselves | diri | pron. | A2 |
| 69 | out | keluar | adv./prep. | A1 |
| 70 | outcome | hasil | n. | B2 |
| 71 | outdoor | luar ruangan | adj. | B1 |
| 72 | outdoors | di luar rumah | adv. | B1 |
| 73 | outer | luar | adj. | B2 |
| 74 | outline | garis besar | n., v. | B2 |
| 75 | outside | di luar | adv. | A1 |
| 76 | oven | oven | n. | A2 |
| 77 | over | lebih | prep., adv. | A1 |
| 78 | overall | keseluruhan | adj., adv. | B2 |
| 79 | owe | utang | v. | B2 |
| 80 | own | memiliki | adj./pron. | A1 |
| 81 | owner | pemilik | n. | A2 |
Klik pada huruf untuk memilih huruf awal kosakata bahasa Inggris:
| __A__ | __B__ | __C__ | __D__ | __E__ | __F__ | __G__ | __H__ | __I__ | __J__ | __K__ | __L__ | __M__ | __N__ | __O__ | __P__ | __Q__ | __R__ | __S__ | __T__ | __U__ | __V__ | __W__ | __Y__ | __Z__ | Keterangan Jenis Kata dan Level | Pronunciation | Halaman Awal |
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