know what are doing



know what you are doing

to have the necessary knowledge or experience to do something Mountain climbing is a dangerous sport, so I hope he knows what he's doing.
See also: know

Common Names:

NameGenderPronouncedUsage
AnettAW-netHungarian
Madelief-Dutch
HƯƠNg-Vietnamese
Zephyrus-Greek Mythology (Latinized)
Andjela-Serbian
Helenahe-LE-nah (German, Swedish, Norwegian, Danish, Polish), hay-LAY-nah (Dutch), HE-le-nah (Finnish)German, Dutch, Swedish, Norwegian, Danish, Icelandic, Portuguese, Polish, Czech, Slovak, Finnish, Es