стабилен означава в английски

firm [firmer, firmest]▼(steadfast, secure (position))
adjective
[UK: fɜːm] [US: ˈfɝːm]

stable [stabler, stablest]▼(relatively unchanging)
adjective
[UK: ˈsteɪb.l̩] [US: ˈsteɪb.l̩]

steady [steadier, steadiest]▼(firm)
adjective
[UK: ˈste.di] [US: ˈste.di]

uncertain▼(fitful or unsteady)
adjective
[UK: ʌn.ˈsɜːt.n̩] [US: ʌn.ˈsɝː.tn̩]

unstable▼(not stable)
adjective
[UK: ʌn.ˈsteɪb.l̩] [US: ʌn.ˈsteɪb.l̩]