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in the PONS Dictionary

I. reef [ri:f] N

1. reef GEOG:

Riff nt <-(e)s, -e>
coral reef
Korallenriff nt <-(e)s, -e>
reef (of gold ore)

2. reef (of a sail):

reef
Reff nt

II. reef [ri:f] VB trans

ˈbar·ri·er reef N

barrier reef
Wallriff nt <-(e)s, -e>

cor·al ˈreef N

coral reef
Korallenriff nt <-(e)s, -e>

ˈreef knot N

reef knot
Kreuzknoten m <-s, ->

barrier reef [ˈbæriəˌriːf] N

reef-building ADJ

Present
Ireef
youreef
he/she/itreefs
wereef
youreef
theyreef
Past
Ireefed
youreefed
he/she/itreefed
wereefed
youreefed
theyreefed
Present Perfect
Ihavereefed
youhavereefed
he/she/ithasreefed
wehavereefed
youhavereefed
theyhavereefed
Past Perfect
Ihadreefed
youhadreefed
he/she/ithadreefed
wehadreefed
youhadreefed
theyhadreefed
dev
dev
dev
dev