losing-present participle of lose (Verb)
1. Be deprived of or cease to have or retain (something): "I've lost my appetite".
2. Cause (someone) to fail to gain or retain (something): "you lost me my appointment at the university"
loosing-present participle of loose (Verb)
1. Set free; release: "the hounds have been loosed".
2. Untie; unfasten: "the ropes were loosed".
That is all.