ingrow

From a back-formation of ingrown, equivalent to in- +‎ grow.

• IPA^(key): /ɪnˈɡroʊ/

ingrow (third-person singular simple present ingrows, present participle ingrowing, simple past ingrew, past participle ingrown)

1. To grow in; grow inwardly.
2. To become ingrown.
   • 1911, The Medical Fortnightly

     The toe nail should always extend to the end of the toe and it will never ingrow.

• ingrowing

• ingrowth
• ingrown

• growin', rowing