8 letters · 19 points in Scrabble
adjective engaged in or accustomed to close observation
adjective experiencing or accompanied by sleeplessness; ; ; ; - Shakespeare
originFrom Middle English waccheful, equivalent to watch + -ful. Compare West Frisian waaks (“watchful”), Dutch waaks, waakzaam (“watchful”), German wachsam (“watchful”), Swedish vaksam (“watchful”).
Etymology from Wiktionary, CC BY-SA 3.0