Synonyms of the word

timeless

• adj. Eternal.
• adj. Not affected by time; ageless.
• adj. (obsolete) Done at an improper time; unseasonable; untimely.
• adj. Not decreasing over time in quality and appeal.

dateless

• adj. Out of one's head; deranged.
• adj. (Britain, dialect, slang) thick-headed.
• adj. Without a date imprinted, assigned, or associated.
• adj. Having no date—a meeting with a lover or potential lover.
• adj. Timeless; immortal.
• adj. Without a start; immemorial.
• adj. (archaic) Without an end; endless.

unaltered

• adj. Remaining in its initial state.

unchanged

• adj. Not changed or altered; remaining in an original state.
• v. simple past tense and past participle of unchange.