• to change into second, to shift into second
• to insert, to put in circuit
• to engage the first gear
• to outthink, outthought
• attached, copulate, joint
• contact, copulative, switch
• affiliation, articulation, association, attach, conjunction, connection, contact, copula, copulae, correspondence, dealings, hook-up, liaison, linkage, linking, nexus, passages, rapport, reference, relation, relationship, tie
• contact, copulative, coupling, fastening, joint, stud
• make it snappy!, put some vim into it!