Definition of acantho- in English:

acantho-

Syllabification: acantho-
(also acanth- before a vowel)

combining form

Having thornlike characteristics.

Origin

from Greek akantha 'thorn'.

Definition of acantho- in:

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Word of the day demoralize
Pronunciation: dəˈmôrəˌlīz
verb
cause (someone) to lose confidence or hope; dispirit