Adjective
Like a grandfather in age or manner; kind; benignant; indulgent.
Source: Webster's dictionaryNo gray hairs streak my soul, no grandfatherly fondness there! I shake the world with the might of my voice, and walk – handsome, twentytwoyearold. Vladimir Mayakovsky
No gray hairs streak my soul, no grandfatherly fondness there! I shake the world with the might of my voice, and walk-handsome, twentytwoyearold. W. Somerset Maugham
He has a gentle, almost grandfatherly quality, but he doesn’t shy away from combat.” Source: Internet
Yes, this may seem logical and obvious, but the real reason these timekeeping devices (technically called “Longcase clocks”) picked up the grandfatherly nickname has nothing to do with grandparents per se. Source: Internet