principium (noun) fundamental: basic, essential part
Sinonime: beyond price, cherished, collectible, costly, dear,
expensive, incalculable,
incomparable, inestimable, invaluable, out-of-bounds, out-of-sight, prized,
rare, rich, treasured, valuable,
valued, without price, worth a king's ransom, worth its weight in gold
Antonime: cheap, replaceable,
useless,
worthless