profound Synonyms

unsounded erudite learned grave wise serious weighty intense deep astute heavy intellectual fundamental penetrating unplumbed unfathomed sound revolutionary sincere soundless sensitive sounder severe significant solemn sophisticated solid seismic perceptive percipient perspicacious philosophic philosophical profoundness punishing radical recondite resonant sage sapient sapiential scholarly scholastic penetrative subaqueous subdolous meaningful unbearable well done soulful