From raqaq; spittle -- spit(-ting, -tle).
see HEBREW raqaq
H7536. roq
רֹק noun [masculine] spittle; — absolute ׳ר Isaiah 50:6; Job 30:10 (both of contemptuous spitting); suffix רֻקִּי 7:19 while I swallow (בָּלַע) my spittle, i.e. for the briefest time.