extravagant
adjective
[ ɪkˈstravəɡ(ə)nt ]
• lacking restraint in spending money or using resources.
• "it was rather extravagant to buy both"
Similar:
spendthrift,
profligate,
unthrifty,
thriftless,
improvident,
wasteful,
free-spending,
prodigal,
squandering,
lavish,
immoderate,
excessive,
imprudent,
reckless,
irresponsible,
Origin:
late Middle English (in the sense ‘unusual, unsuitable’): from medieval Latin extravagant- ‘diverging greatly’, from the verb extravagari, from Latin extra- ‘outside’ + vagari ‘wander’.