hang on

(verb) fix to; attach. Synonyms: append, tag on, tack on, tack, hang on. Example: "Append a charm to the necklace."

(verb) be persistent, refuse to stop. Synonyms: persevere, persist, hang in, hang on, hold on. Examples: "He persisted to call me every night." "The child persisted and kept asking questions."

(verb) hold the phone line open. Synonyms: hang on, hold the line, hold on. Example: "Please hang on while i get your folder."