| Subaqueous 1. (a.) Being under water, or beneath the surface of water; adapted for use under water; submarine; as, a subaqueous helmet. 2. (a.) Formed in or under water; as, subaqueous deposits. Thesaurus Entries abstruse, beclouded, blind, close, clouded, concealed, covered, covert, deep-buried, drowned, eclipsed, engulfed, flooded, guarded, hid, hidden, immersed, in a cloud, in a fog, in eclipse, in purdah, in the wings, incommunicado, inundated, latent, mysterious, obfuscated, obscure, obscured, occult, privy, recondite, secluded, secluse, secret, sequestered, shrouded, subaqueous, submarine, submerged, submersed, subterranean, subterraneous, sunken, under an eclipse, under cover, under house arrest, under wraps, underground, undersea, underwater, unknown, wrapped in clouds |