Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
straightness is a noun meaning "(of hair) lack of a tendency to curl". It carries 5 recorded senses.
freedom from crooks or curves or bends or angles
trueness of course toward a goal
“rivaling a hawk in directness of aim”
having honest intentions
“he acted in good faith”
“doubt was expressed as to the good faith of the immigrants”
a sexual attraction to (or sexual relations with) persons of the opposite sex
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 straightness come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.