HackerVoca

tough : firm, strong, hard, sturdy
trace* : vestige, mark, sign, track, footprint, trail
traffic : trade
tragic : mournful, pathetic, pitiful, disastrous
trail1 / / verb

1 [intransitive, transitive always + adv/prep] if something trails behind you, or if you trail it behind you, it gets pulled behind you as you move along

[+ across/in/through]: She walked slowly along the path, her skirt trailing in the mud. | trail sth in/on/through: Rees was leaning out of the boat trailing his hand through the water.

2 also trail along [intransitive always + adv/prep] to walk slowly, especially because you are tired or bored, and often following other people

[+ behind/around]: Susie trailed along behind her parents.

3 [intransitive, transitive usually in progressive] to be losing in a game, competition, or election: The Democrats are still trailing in the latest poll. | trail (sb) by: At the end of the first half Bolton were trailing by two goals to nil.

4 [transitive] to follow a person or animal by looking for signs that they have gone in a particular direction: Police trailed the gang for several days.

also trailer

trail away/off phrasal verb [intransitive]

if someone's voice trails away or off, it becomes gradually quieter and then stops: She trailed off, silenced by the look Kris gave her.