| four-lane highway | vierspurige Autobahn |
| four-layer | vierlagig |
| four-layer device | Vierschichtbauelement |
| four-layer diode | Vierschichtdiode |
| four-layer triode | Vierschichttriode |
| four-leaf | vierblättrig |
| four-leaf bird's-foot trefoil | Vierblättriger Hornklee |
| four-leaf clover | vierblättriges Kleeblatt |
| four-leafed | vierblätterig |
| four-leaved allseed | Vierblättriges Nagelkraut |
| four-leaved bird's-foot trefoil | Vierblättriger Hornklee |
| four-leaved clover | vierblättriges Kleeblatt |
| four-leaved kidney vetch | Blasen-Wundklee |
| four-leaved table | vierflügeliger Tisch |
| four-legged | vierbeinig |
| four-legged friend | Vierbeiner |
| four-letter word | unanständiges Wort |
| four-letter words | Flüche |
| four-letter-word | Vulgärausdruck |
| four-letter-words | Vulgärausdrücke |
| four-level laser | Vierniveau-Laser |
| four-line octave | viergestrichene Oktave |
| four-lined snake | Vierstreifennatter |
| four-lip | vierschneidig |
| four-lip counterbore | Vierschneidensenker |
| four-lipped | vierschneidig |
| four-lipped end mill | Vierschneider |
| four-lobe pump | Vierkammer-Kreiskolbenpumpe |
| four-man backfield | Viererkette |
| four-man bob | Viererbob |
| four-man bobsleigh | Viererbob |
| four-masted bark | Viermastbark |
| four-masted barque | Viermastbark |
| four-masted schooner | Viermast-Schoner |
| four-master | Viermaster |
| four-masters | Viermaster |
| four-momentum | Viererimpuls |
| four-momentum transfer | Viererimpulsübertrag |
| four-monthly | viermonatig |
| four-needle sewing machine | Viernadel-Nähmaschine |
| four-pack | Viererpack |
| four-panelled door | Vierfüllungstür |
| four-panelled doors | Vierfüllungstüren |
| four-part | vierteilig |
| four-part ... | vierstimmig |
| four-party line with selective ringing | Viereranschluß |
| four-person household | Vier-Personen-Haushalt |
| four-phase modulator | Vierphasenmodulator |
| four-phase operation | Vierphasenbetrieb |
| four-phase technique | Vierphasentechnik |
| four-piece rim | vierteilige Felge |
| four-place | vierstellig |
| four-plus-one address | Vier-plus-Eins-Adresse |
| four-ply wool | Vierfachwolle |
| four-point bridle | Abseilspinne |
| four-point probe | Vierspitzensonde |
| four-point probe measurement | Vierpunktmessung |
