مَكُنَ: قَوِيَ، مَتُنَ، رَسَخَ to be or become strong, firm, solid, fixed, stable, unshakable, firmly established

مَكُنَ عِنْدَهُ: صَارَ ذَا مَنْزِلَةٍ ومَكَانَة to become influential with, have or gain influence (weight, prestige) with