Sickle 
To dream of a sickle represents your efforts and determination. It is symbolic of your labor and hard work. The symbol may also be a clever word play on 'sicko.'
String
To see strings in your dream symbolizes the bonds that you hold in a relationship or issue. It could be relating to the strength and importance of these bonds, or it may indicate that you are harboring anxieties regarding this bond.
Also, this dream may be suggesting that you use your importance and influence to obtain your desires.
To dream that you are tying a string implies that a task or project has slipped your mind and you need to remember what it was.
Subway
To dream that you are in the subway implies that you are attaining your objectives without having to use much physical effort. You are discovering your inner spirituality and personality. It may also mean that you are being too impulsive and you should think carefully before making a decision.
Symbol
To dream of an unknown symbol represents your uncertainty, confusion, or lack of awareness for an issue. Pay attention to the symbol itself. The shape or similarity to another object may also hold importance.
Tattoo
To dream that your body has a tattoo signifies an urgent business matter. This matter will need your immediate attention and take you away from friends and family. The tattoo may also indicate life changes.
To see tattoos on those around you is a warning. Someone in your waking life will soon become jealous of you and what you have achieved.
To dream that you and a friend are getting a tattoo symbolizes the true friendship you share together.
To dream that you are a tattoo artist is a reminder that not everyone around you will accept the lifestyle you have chosen for yourself.
Tights
To dream that you are wearing tights indicates that you are comfortable revealing things about your character.
Trowel
To dream of a trowel indicates kindness and love that you give to other people.
Tunnel
To dream of a tunnel represents the main female reproductive organ, the womb, and giving birth. Hence, it may indicate your need for protection and nurturing.
To dream that you are going through a tunnel suggests that you are discovering parts of your unconscious. You are in the process of gaining understanding and enlightenment. Alternatively, it may indicate your myopic nature.
To see light at the end of the tunnel symbolizes hope and a brighter future.
Tuxedo
To dream of seeing or wearing a tuxedo represents sophistication and grace. It refers to your preference for more expensive, top quality things. Alternatively, it suggests that you have a grand dream for yourself.