निगरानी —

निगरानी  f) supervision; guard, watch (vigilancia)

निगरानी करना/निगरानी रखना  v) invigilate (vigilar)

की निगरानी में  under the supervision

सख्त निगरानी में  under strict supervision, under close surveillance

सख्त/सख़्त  a) hard (duro, firme, difícil); harsh (duro, severo); strict; rigorous; serious; adv) severely, extremely, violently, intensely