The Dutch word for hair is
haar

Dutch Definition

hair
1. haar

haar	©
1. pron. (personal) Third-person singular, feminine object pronoun: her
Ik zeg het tegen haar (1), maar je kunt haar (2) beter nog een mailtje sturen. - I’ll mention it to her, but you’d better send her a mail as well.
(1) accusative personal pronoun, (2) dative personal pronoun
2. det. Third-person singular, feminine possessive adjective: her
Zij is haar sleutels vergeten. - She forgot her keys.
3. n-n. (topics, Body parts) hair (collection of hairs)
4. n-n. (topics, Body parts) hair (mammalian keratin filament)
5. n-n. (topics, Botany) trichome (hair-like growth on a plant)
6. n-n. a bit, minute quantity