noun which may take the genitive case particle 'no'
overflowing; brimming; bursting with
Describes something so abundant that it seems about to overflow. Often used with emotions, energy, or physical quantities. Functions as a pre-noun adjectival (の-adjective).
彼女の目には溢れんばかりの涙が浮かんでいた。
Her eyes were brimming with tears.
会場は溢れんばかりの観客で埋まった。
The venue was filled to overflowing with spectators.