soundly
adverb
[ ˈsaʊndli ]
• in a way that is secure and reliable.
• "their houses were soundly built"
• in a way that is based on valid reason or good judgement.
• "there is soundly based reason for optimism"
• (with reference to sleep) deeply and without disturbance.
• "I slept soundly for the first time since I've been here"
• in a thorough or decisive manner.
• "Jim was soundly defeated by his old opponent"