Word: heightened
Part of speech: Verb
Syllables: heigh
tened
Definition: Simple past tense and past participle of heighten; make more intense, stronger, or more marked; 
Morphemes:
Affix: high
Language: en
PoS: Verb
Meaning: To rise.
Affix: -th
Language: en
PoS: Suffix
Meaning: A variant of -eth, used to form the archaic third-person singular indicative present tense of verbs.
Affix: -en
Language: en
Meaning: inchoative
Affix: -ed
Language: en
PoS: Suffix
Meaning: Used to form past participles of (regular) verbs. See -en and -t for variants.