"whitewater rafting is not for the timid"
"stood in the doorway diffident and abashed" "problems that call for bold not timid responses" "a very unsure young man"
"faint heart ne'er won fair lady"
She has given him some timid encouragement.
牛津高阶第八版
美国韦氏词典
Dictionary.com
Free Dictionary
维基百科 (自由的百科全书)