Here is a step-by-step guide on how to pronounce 'primer':
1. Begin with the 'p' sound, making sure to aspirate it.
2. Next, pronounce the 'r' sound, making it distinct and clear.
3. Follow this with the 'ay' sound, forming a diphthong.
4. Finally, pronounce the 'mer' syllable, emphasizing the 'm' and 'r' sounds.
5. The stress should be placed on the first syllable, making it 'PRAHy-mer'.
Remember to practice pronouncing 'primer' slowly and clearly until you are comfortable with the pronunciation.