1.
BENEVOLENT : Kind and generous; showing a desire to help others.
2.
KIND : A synonym of benevolent; showing care and warmth toward others.
3.
ARDUOUS : Very difficult and requiring a lot of effort or endurance.
4.
DIFFICULT : A synonym of arduous; not easy to do or understand.
5.
VIGILANT : Watchful and alert, especially to avoid danger or problems.
6.
WATCHFUL : A synonym of vigilant; carefully observing things.
7.
SUCCINCT : Brief and clearly expressed using few words.
8.
MALICIOUS : The opposite of benevolent; intending to harm or hurt others.
9.
NEGLIGENT : The opposite of vigilant; careless or not paying attention.
10.
WORDY : The opposite of succinct; using too many unnecessary words.
