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in·val·u·a·ble

invaluable

 
 
pronunciation:
In vael yu bl [or] In vael y bl
features:
Word Parts
part of speech: adjective
definition: having value too great to guess or measure; priceless.
He gave invaluable help during her illness.This ring from my grandmother is invaluable to me.
 
synonyms:
priceless
antonyms:
worthless
similar words:
dear, precious, rare
derivations: invaluably (adv.), invaluableness (n.)
Word Parts  About this feature
The word invaluable contains the following parts:
in-2 Latin prefix that means not, without
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The prefix in-2 occurs in Latin loanwords and attaches to Latinate bases. The bases of most words prefixed with in-2 are independent adjectives (inadvertent, incognizant), although the base adjective may no longer be in widespread use (as with incessant ). Exceptions include iniquitous and indignant . -in2 has multiple forms, as the 'n' sound in in-2 assimilates to the initial sound of the base to which it is attached. See the assimilated forms ig-, il-2, im-2, and ir-2.
val, valu, valid Latin root that means strength; worth
-able, -ible, -ble Latin adjective-forming suffix that means capable of being, doing, or undergoing
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The suffix -able , and its variants, is attached to Latin verb roots or English transitive verbs to form adjectives. (In a small set of cases, -able is attached to a noun, e.g. knowledgeable and marriageable.) For spelling purposes, it is useful to know that -able is more likely to be added to a whole English word (comparable, adorable ), while -ible is more likely to follow a bound root (visible , legible ). However,there are still many words which combine a root with -able (capable , inevitable ). The suffix -ity can be added to any adjective ending in -able , -ible , -ble to produce a corresponding noun ending in -ability, -ibility, -bility (possible + -ity > possibility; irrevocable + -ity > irrevocability.)