strog

1. (of a person, look) strict; stern
   Naš profesor matematike je veoma strog. — Our maths teacher is very strict.
   Pogledala ga je strogim pogledom. — She gave him a stern look.
2. (of rules, measures) strict; rigorous
   Na aerodromu su stroge mere bezbednosti. — There are strict security measures at the airport.
   Doktor mi je prepisao strogu dijetu. — The doctor put me on a strict diet.
3. (of punishment, criticism) severe; harsh
   Za to krivično delo predviđena je stroga kazna. — That crime carries a severe penalty.
4. (in set phrases) very; strictest
   Stan je u strogom centru Beograda. — The flat is right in the centre of Belgrade.
   Sve se radilo u strogoj tajnosti. — Everything was done in the strictest secrecy.

'Strict with someone' is strog prema nekome.