ingrown (adj.)

• confirmed
• deep-laid
• deep-rooted
• deep-seated
• deep-set
• embedded
• embossed
• engraved
• entrenched
• established
• etched
• graven
• implanted
• impressed
• ingrained
• inveterate
• inwrought
• old-line
• rooted
• set
• settled
• stabilized
• vested
• well-founded
• well-grounded
• well-set