Tear is to sorrow as smile is to <u>joy</u> or <u>happiness</u>.
To tear usually means to be sad, or have sorrow. Smiling is an expression of happiness or joy.
Hope this helped :) <-- Joy :P
A participle, a gerund, or an infinitive May be used as a noun substitute. The infinitive functions either as an adjective or as a noun.
Answer:
Lincoln said:
"I am glad I made the late race. It gave me a hearing on the great and durable questions of the age, which I could have had in no other way; and though I now sink out of view, and shall be forgotten, I believe I have made some marks which will tell for the cause of civil liberty long after I am gone."
-Lincoln After Losing 1858 Senate Race