| essential infrastructure | prasarana penting/infrastruktur penting | infrastruktur/ prasarana penting | infrastruktur/ prasarana penting | Sains Politik |
| symbol, significant | simbol/lambang penting | Tiada | lambang penting/simbol penting | Sosiologi |
| essential polyhedron | polihedron penting | polihedron penting | polihedron penting | Matematik |
| essential element | unsur penting | unsur penting | unsur penting | Matematik |
| essential cycle | siklus penting | kitar penting | unsur penting | Matematik |
| essential equivalence | kesetaraan esensial | kesetaraan penting | kesetaraan penting | Sains Politik |
| essential singularity | kesingularan esensial | Tiada | kesingularan penting | Matematik |
| key pest | hama utama, hama kunci | perosak khusus | perosak penting | Pertanian |
| essential singular point | titik singular esensial | Tiada | titik singular penting | Matematik |
| high-key lighting | pencahayaan benderang | pencahayaan penting tinggi | pencahayaan benderang | Komunikasi Massa |