decoration, ornament, ornamentation - something used to beautify

clinch - the flattened part of a nail or bolt or rivet

pin - a small slender (often pointed) piece of wood or metal used to support or fasten or attach things

engross, engulf, steep, soak up, immerse, absorb, plunge - engross (oneself) fully; "He immersed himself into his studies"

cerebrate, cogitate, think - use or exercise the mind or one's power of reason in order to make inferences, decisions, or arrive at a solution or judgments; "I've been thinking all day and getting nowhere"

rivet - hold (someone's attention); "The discovery of the skull riveted the paleontologists"

recall - cause one's (or someone else's) thoughts or attention to return from a reverie or digression; "She was recalled by a loud laugh"

think - focus one's attention on a certain state; "Think big"; "think thin"

zoom in - examine closely; focus one's attention on; "He zoomed in on the book"

take heed, listen, hear - listen and pay attention; "Listen to your father"; "We must hear the expert before we make a decision"

fasten, fix, secure - cause to be firmly attached; "fasten the lock onto the door"; "she fixed her gaze on the man"

engage, engross, occupy, absorb - engage or engross wholly; "Her interest in butterflies absorbs her completely"

focus, pore, rivet, center, centre, concentrate - direct one's attention on something; "Please focus on your studies and not on your hobbies"