Term: skin diving: underwater swimming without any more breathing equipment than a snorkel
Broader: act: something that people do or cause to happen | Unrelated: skirt: cloth covering that forms the part of a garment below the waist
Broader: act: something that people do or cause to happen | Unrelated: planck's constant: the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second
Broader: act: something that people do or cause to happen | Unrelated: exigency: a pressing or urgent situation
Broader: act: something that people do or cause to happen | Unrelated: tree cotton: East Indian shrub cultivated especially for ornament for its pale yellow to deep purple blossoms
Broader: act: something that people do or cause to happen | Unrelated: volvocaceae: unicellular or colonial biflagellate free-swimming flagellates
Broader: act: something that people do or cause to happen | Unrelated: variety: (biology) a taxonomic category consisting of members of a species that differ from others of the same species in minor but heritable characteristics
Broader: act: something that people do or cause to happen | Unrelated: dragunov: a sniper rifle with a telescopic sight
Broader: act: something that people do or cause to happen | Unrelated: peeper: an animal that makes short high-pitched sounds
Broader: act: something that people do or cause to happen | Unrelated: creeping soft grass: European perennial grass with soft velvety foliage
Broader: act: something that people do or cause to happen | Unrelated: shiite: a member of the branch of Islam that regards Ali as the legitimate successor to Mohammed and rejects the first three caliphs