unobtainium
构词拆分
unobtainable词根/词干
+
-ium后缀
(chemistry) Used to form the names of metal elements, after the style of early-named elements, as well as the isotopes of hydrogen. · (chemistry) Used to form the temporary systematic element name of a metallic or nonmetallic element which is postulated to exist, or which has been newly synthesized and has not yet been assigned a permanent name.
词源说明
From unobtain(able) + -ium (suffix typical of names of atomic elements), modelled after uranium and titanium. Compare also the origin of dysprosium.