Stressed syllables sound louder, are usually longer, and have clearer vowels and stronger consonants. In a word said in isolation, stressed syllables are higher pitched; in sentences, a pitch change (a change in melody from high to low or low to high) often occurs on stressed syllables. Unstressed syllables sound softer, are usually shorter, and are frequently reduced or centralized. This means that the vowels tend to become /ə/, /ɪ/, /ɚ/, or /ʊ/, and the consonants are weaker. The pitch doesn’t change direction on unstressed syllables.

However, they also distinguish in the primary and secondary accent, as well as unstressed. Listen to the word you want.

These suffixes are stressed.

-ain         eɪn               
-ee         i               
-eer         iɚ               
-ese         iːz               
-ette         ɛt               
-esque         ɛsk               
-ique         iːk                

Stress falls on the syllable immediately before these suffixes

-ial         i·əl                
-cial         ʃəl                
-tial         ʃəl               
-ual         ʃəwəl              
-ual         ʤəwəl    
-ual        ʒəwəl     
-ian         ijən       
-cian         ʃən       
-sian         ʒən       
-ion         jən       
-tion         ʃən       
-ssion         ʃən       
-sion         ʒən       
-cient         ʃənt         
-tient         ʃənt   
-ious         ijəs       
-eous         ijəs       
-cious         ʃəs       
-tious         ʃəs       
-geous         ʤəs     
-gious         ʤəs   
-uous         jəwəs       
-uous         juwəs    
-ic         ɪk     
-ical         ɪkəl     
-ity         əti     
-ify         əˌfaɪ     
-itive         ətɪv     
-itude         əˌtuːd     
-logy         ləʤi     
-graphy         grəfi     

Stress falls two syllables before these suffixes.

-ate         eɪt (verbs)    
-ate         ət (adjectives and nouns)    
-ize         aɪz (verbs)    
-ary         eri     

Important exceptions:

-ee             
-ic               
-ion             
-ize             
-tary         tri     
-tary         təri