patchy

adjective
1
existing or happening in some places and not others
لکه‌لکه‌ای, نامنظم, پراکنده, غیر یکنواخت, لکه‌لکه
synonym uneven
2
not complete; good in some parts, but not in others
نایکنواخت, نامنظم, پراکنده, غیرهمگون, نامنسجم, ناقص, نیمه‌کاره
a patchy knowledge of Spanish
It was a patchy performance.
The local provision of facilities is decidedly patchy.