Words stick in (one's) throat informal
If words stick in your throat, you are too emotional that you can't say something.
You didn't know how grateful I was. Back then, words just stuck in my throat.
Words stuck in her throat when she agreed to his proposal.
1. To be covered by a layer of fog or drops of water so one could hardly see.
2. To become overly sensitive and easily cry over something.
To cause an emotional reaction for someone