drowsing is drowse's Present Participle

drowse

US [draʊz]
UK [draʊz]
  • v.使昏昏欲睡;糊里糊涂地度过;打盹儿;发呆
  • n.瞌睡
Simple Present:drowses  Present Participle:drowsing  Past Tense:drowsed  
n.
1.
瞌睡
v.
1.
使昏昏欲睡;糊里糊涂地度过 (away)
2.
打盹儿,打瞌睡
3.
发呆;呆滞不动