| ineffizient | inefficient |
| Ineffizienz | inefficiency |
| effizient | efficient |
| insuffizient | insufficient |
| Effizienz | efficiency |
| inoffiziell | informal |
| Insuffizienz | insufficiency |
| Koeffizient | coefficient |
| suffizient | sufficient |
| infiziert | infected |
| defizient | deficient |
| Suffizienz | sufficiency |
| ineffabel | ineffable |
| kosteneffizient | cost-effective |
| Offizier | officer commissioned officer mate piece |
| affigiert | advertised placarded |
| offiziell | official officially |
| raffiniert | refined sophisticated clever cunning ingenious sly |
| Defizit | deficit deficiency |
| infizieren | infect |