say it: THAWT-fuhl-nis
thoughtfulness is a noun meaning "a calm, lengthy, intent consideration". It carries 4 recorded senses.
a calm, lengthy, intent consideration
kind and considerate regard for others
“he showed no consideration for her feelings”
the trait of thinking carefully before acting
a considerate and thoughtful act
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for thoughtfulness come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.