вникнуть (в вн. )
go* deep (into); consider carefully ( d. ); несов. тж. try to grasp / understand ( d. )
необходимо вникнуть в это дело — the matter must be thoroughly investigated / examined / scrutinized; the matter must be gone into
не вникая в суть дела — without inquiring / going into the heart of the matter, without going to the root of the matter